Performance information

• Blending Optimal Control and Biologically Plausible Learning for Noise-Robust Physical Neural Networks　　　　　　　　　　　　　　　
  Satoshi Sunada; Tomoaki Niiyama; Kazutaka Kanno; Rin Nogami; André Röhm; Takato Awano; Atsushi Uchida
  Physical Review Letters, Volume：134, Number：1, Jan. 2025
  The rapidly increasing computational demands for artificial intelligence (AI) have spurred the exploration of computing principles beyond conventional digital computers. Physical neural networks (PNNs) offer efficient neuromorphic information processing by harnessing the innate computational power of physical processes; however, training their weight parameters is computationally expensive. We propose a training approach for substantially reducing this training cost. Our training approach merges an optimal control method for continuous-time dynamical systems with a biologically plausible training method - direct feedback alignment. In addition to the reduction of training time, this approach achieves robust processing even under measurement errors and noise without requiring detailed system information. The effectiveness was numerically and experimentally verified in an optoelectronic delay system. Our approach significantly extends the range of physical systems practically usable as PNNs.
  Scientific journal
  DOI：https://doi.org/10.1103/PhysRevLett.134.017301
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85214375592&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85214375592&origin=inward
  DOI ID：10.1103/PhysRevLett.134.017301, ISSN：0031-9007, eISSN：1079-7114, PubMed ID：39913739, SCOPUS ID：85214375592
• Prediction of intermittent chaos in a semiconductor laser with optical feedback using reservoir computing　　　　　　　　　　　　　　　
  S. Ohara; K. Kanno; A. Uchida; H. Kurokawa
  Japanese Journal of Applied Physics, Volume：64, First page：012001-1, Last page：012001-7, Jan. 2025, [Reviewed]
  Scientific journal
• Controlling nonlinearity and memory by feedback delay time in delay-based reservoir computing　　　　　　　　　　　　　　　
  K. Saito; K. Kanno; A. Uchida
  Nonlinear Theory and Its Applications, IEICE, Volume：15, Number：4, First page：764, Last page：783, Oct. 2024, [Reviewed], [Last]
  Scientific journal
• Attention-enhanced reservoir computing
  Felix Köster; Kazutaka Kanno; Jun Ohkubo; Atsushi Uchida
  Physical Review Applied, Volume：22, Number：1, First page：014039, Jul. 2024, [Reviewed]
  American Physical Society (APS), Scientific journal
  DOI：https://doi.org/10.1103/physrevapplied.22.014039
  DOI ID：10.1103/physrevapplied.22.014039, eISSN：2331-7019
• Entropy analysis on chaos excited through destabilization of semiconductor lasers at period-one nonlinear dynamics for physical random number generation　　　　　　　　　　　　　　　
  C.-H. Tseng; R. Funabashi; K. Kanno; A. Uchida; C.-C. Wei; S.-K. Hwang
  Optics Express, Volume：32, Number：13, First page：23097, Last page：23114, Jun. 2024, [Reviewed]
  DOI：https://doi.org/10.1364/OE.523502
  DOI ID：10.1364/OE.523502
• Experimental control of mode-competition dynamics in a chaotic multimode semiconductor laser for decision making
  Ryugo Iwami; Takatomo Mihana; Kazutaka Kanno; Makoto Naruse; Atsushi Uchida
  Optics Express, Volume：32, Number：10, First page：17274, Last page：17274, Apr. 2024
  Photonic computing is widely used to accelerate the computational performance in machine learning. Photonic decision making is a promising approach utilizing photonic computing technologies to solve the multi-armed bandit problems based on reinforcement learning. Photonic decision making using chaotic mode-competition dynamics has been proposed. However, the experimental conditions for achieving a superior decision-making performance have not yet been established. Herein, we experimentally investigate mode-competition dynamics in a chaotic multimode semiconductor laser in the presence of optical feedback and injection. We control the chaotic mode-competition dynamics via optical injection and observe that positive wavelength detuning results in an efficient mode concentration to one of the longitudinal modes with a small optical injection power. We experimentally investigate two-dimensional bifurcation diagram of the total intensity of the laser dynamics. Complex mixed dynamics are observed in the presence of optical feedback and injection. We experimentally conduct decision making to solve the bandit problem using chaotic mode-competition dynamics. A fast mode-concentration property is observed at positive wavelength detunings, resulting in fast convergence of the correct decision rate. Our findings could be useful in accelerating the decision-making performance in adaptive optical networks using reinforcement learning.
  Optica Publishing Group, Scientific journal
  DOI：https://doi.org/10.1364/oe.517257
  DOI ID：10.1364/oe.517257, eISSN：1094-4087
• Experimental estimation of sample entropy in a semiconductor laser with optical feedback for random number generation　　　　　　　　　　　　　　　
  T. Okuma; K. Kanno; A. Uchida
  Frontiers in Complex Systems, Volume：2, Number：1379464, First page：1, Last page：10, Apr. 2024
• Solving multi-armed bandit problems using a chaotic microresonator comb
  Jonathan Cuevas; Ryugo Iwami; Atsushi Uchida; Kaoru Minoshima; Naoya Kuse
  APL Photonics, Volume：9, Number：3, First page：036112, Last page：1-10, Mar. 2024
  The Multi-Armed Bandit (MAB) problem, foundational to reinforcement learning-based decision-making, addresses the challenge of maximizing rewards amid multiple uncertain choices. While algorithmic solutions are effective, their computational efficiency diminishes with increasing problem complexity. Photonic accelerators, leveraging temporal and spatial-temporal chaos, have emerged as promising alternatives. However, despite these advancements, current approaches either compromise computation speed or amplify system complexity. In this paper, we introduce a chaotic microresonator frequency comb (chaotic comb) to tackle the MAB problem, where each comb mode is assigned to a slot machine. Through a proof-of-concept experiment, we employ 44 comb modes to address an MAB with 44 slot machines, demonstrating performance competitive with both conventional software algorithms and other photonic methods. Furthermore, the scalability of decision making is explored with up to 512 slot machines using experimentally obtained temporal chaos in different time slots. Power-law scalability is achieved with an exponent of 0.96, outperforming conventional software-based algorithms. Moreover, we find that a numerically calculated chaotic comb accurately reproduces experimental results, paving the way for discussions on strategies to increase the number of slot machines.
  AIP Publishing, Scientific journal
  DOI：https://doi.org/10.1063/5.0173287
  DOI ID：10.1063/5.0173287, eISSN：2378-0967
• 光リザーバコンピューティングと光強化学習の進展　　　　　　　　　　　　　　　
  内田 淳史
  フォトニクスニュース (解説論文), Volume：Vol. 9, Number：No. 3, First page：114, Last page：119, 2024
• Synchronization of two chaotic microresonator frequency combs　　　　　　　　　　　　　　　
  D. Moreno; S. Fujii; A. Nakashima; D. Lemcke; A. Uchida; P. Sanchis; T. Tanabe
  Optics Express, Volume：32, Number：2, First page：2460, Last page：2472, Jan. 2024, [Reviewed]
• Parallel photonic accelerator for decision making using optical spatiotemporal chaos
  Kensei Morijiri; Kento Takehana; Takatomo Mihana; Kazutaka Kanno; Makoto Naruse; Atsushi Uchida
  Optica, Volume：10, Number：3, First page：339, Last page：339, Mar. 2023
  Photonic accelerators have attracted increasing attention for use in artificial intelligence applications. The multi-armed bandit problem is a fundamental problem of decision making using reinforcement learning. However, to the best of our knowledge, the scalability of photonic decision making has not yet been demonstrated in experiments because of the technical difficulties in the physical realization. We propose a parallel photonic decision-making system to solve large-scale multi-armed bandit problems using optical spatiotemporal chaos. We solved a 512-armed bandit problem online, which is larger than those in previous experiments by two orders of magnitude. The scaling property for correct decision making is examined as a function of the number of slot machines, evaluated as an exponent of 0.86. This exponent is smaller than that in previous studies, indicating the superiority of the proposed parallel principle. This experimental demonstration facilitates photonic decision making to solve large-scale multi-armed bandit problems for future photonic accelerators.
  Optica Publishing Group, Scientific journal
  DOI：https://doi.org/10.1364/optica.477433
  DOI ID：10.1364/optica.477433, eISSN：2334-2536
• Analysis of temporal structure of laser chaos by Allan variance
  Naoki Asuke; Nicolas Chauvet; André Röhm; Kazutaka Kanno; Atsushi Uchida; Tomoaki Niiyama; Satoshi Sunada; Ryoichi Horisaki; Makoto Naruse
  Physical Review E, Volume：107, Number：1, First page：014211, Last page：1-8, Jan. 2023
  American Physical Society (APS), Scientific journal
  DOI：https://doi.org/10.1103/physreve.107.014211
  DOI ID：10.1103/physreve.107.014211, ISSN：2470-0045, eISSN：2470-0053
• Time-domain photonic image processor based on speckle projection and reservoir computing　　　　　　　　　　　　　　　
  T. Yamaguchi, K. Arai, T. Niiyama, A. Uchida, and S. Sunada
  Communications Physics, Volume：Vol. 6, Number：Article No. 250, First page：1, Last page：10, 2023
• Chaotic mode-competition dynamics in a multimode semiconductor laser with optical feedback and injection　　　　　　　　　　　　　　　
  R. Iwami, K. Kanno, and A. Uchida
  Optics Express, Volume：Vol. 31, Number：No. 7, First page：11274, Last page：11291, 2023
• 光を用いた強化学習・意思決定の最近の展開　　　　　　　　　　　　　　　
  成瀬 誠, 内田 淳史
  応用物理 (解説論文), Volume：Vol. 92, Number：No. 12, First page：730, Last page：734, 2023
• Parallel and deep reservoir computing using semiconductor lasers with optical feedback　　　　　　　　　　　　　　　
  H. Hasegawa, K. Kanno, and A. Uchida
  Nanophotonics, Volume：Vol. 12, Number：No. 5, First page：869, Last page：881, 2023
• Controlling chaotic itinerancy in laser dynamics for reinforcement learning　　　　　　　　　　　　　　　
  Ryugo Iwami; Takatomo Mihana; Kazutaka Kanno; Satoshi Sunada; Makoto Naruse; Atsushi Uchida
  Science Advances, Volume：8, Number：49, First page：1, Last page：13, Dec. 2022
  Photonic artificial intelligence has attracted considerable interest in accelerating machine learning; however, the unique optical properties have not been fully used for achieving higher-order functionalities. Chaotic itinerancy, with its spontaneous transient dynamics among multiple quasi-attractors, can be used to realize brain-like functionalities. In this study, we numerically and experimentally investigate a method for controlling the chaotic itinerancy in a multimode semiconductor laser to solve a machine learning task, namely, the multiarmed bandit problem, which is fundamental to reinforcement learning. The proposed method uses chaotic itinerant motion in mode competition dynamics controlled via optical injection. We found that the exploration mechanism is completely different from a conventional searching algorithm and is highly scalable, outperforming the conventional approaches for large-scale bandit problems. This study paves the way to use chaotic itinerancy for effectively solving complex machine learning tasks as photonic hardware accelerators.
  American Association for the Advancement of Science (AAAS), Scientific journal
  DOI：https://doi.org/10.1126/sciadv.abn8325
  DOI ID：10.1126/sciadv.abn8325, eISSN：2375-2548
• Ultrafast silicon threshold circuitry for chaotic laser time series
  Kazuyuki Wada; Shinsuke Hara; Satoru Tanoi; Akifumi Kasamatsu; Yuta Otsuka; Kawori Sekine; Atsushi Uchida; Makoto Naruse
  AIP Advances, Volume：12, Number：12, First page：125225, Last page：125225, Dec. 2022
  Photonic computing has been intensively studied to explore the ultrahigh bandwidth of lightwaves. However, electronic support is indispensable for the post-processing and control of photonic systems owing to the difficulties encountered in all-optical processing. Herein, we demonstrate an ultrafast silicon circuitry capable of conducting thresholding operations on incoming chaotically oscillating high-bandwidth signals. Such circuits are critical elements in ultrafast random-number generators and photonic reinforcement learning that exploit chaotically oscillating time series. The circuit design, including active inductors for bandwidth expansion, and proof-of-principle fabricated device operations are demonstrated using a 180 nm silicon complementary metal–oxide–semiconductor technology node.
  AIP Publishing, Scientific journal
  DOI：https://doi.org/10.1063/5.0127470
  DOI ID：10.1063/5.0127470, eISSN：2158-3226
• Universal Single-Mode Lasing in Fully Chaotic Billiard Lasers　　　　　　　　　　　　　　　
  Mengyu You; Daisuke Sakakibara; Kota Makino; Yonosuke Morishita; Kazutoshi Matsumura; Yuta Kawashima; Manao Yoshikawa; Mahiro Tonosaki; Kazutaka Kanno; Atsushi Uchida; Satoshi Sunada; Susumu Shinohara; Takahisa Harayama
  Entropy, Volume：24, Number：11, First page：1648, Last page：1-17, Nov. 2022
  By numerical simulations and experiments of fully chaotic billiard lasers, we show that single-mode lasing states are stable, whereas multi-mode lasing states are unstable when the size of the billiard is much larger than the wavelength and the external pumping power is sufficiently large. On the other hand, for integrable billiard lasers, it is shown that multi-mode lasing states are stable, whereas single-mode lasing states are unstable. These phenomena arise from the combination of two different nonlinear effects of mode-interaction due to the active lasing medium and deformation of the billiard shape. Investigations of billiard lasers with various shapes revealed that single-mode lasing is a universal phenomenon for fully chaotic billiard lasers.
  Scientific journal
  DOI：https://doi.org/10.3390/e24111648
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85144897465&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85144897465&origin=inward
  DOI ID：10.3390/e24111648, eISSN：1099-4300, SCOPUS ID：85144897465
• Parallel bandit architecture based on laser chaos for reinforcement learning
  Takashi Urushibara; Nicolas Chauvet; Satoshi Kochi; Satoshi Sunada; Kazutaka Kanno; Atsushi Uchida; Ryoichi Horisaki; Makoto Naruse
  Journal of Physics Communications, Volume：6, Number：6, First page：065002, Last page：065002, Jun. 2022
  Abstract
  
  Accelerating artificial intelligence by photonics is an active field of study aiming to exploit the unique properties of photons. Reinforcement learning is an important branch of machine learning, and photonic decision-making principles have been demonstrated with respect to the multi-armed bandit problems. However, reinforcement learning could involve a massive number of states, unlike previously demonstrated bandit problems where the number of states is only one. Q-learning is a well-known approach in reinforcement learning that can deal with many states. The architecture of Q-learning, however, does not fit well photonic implementations due to its separation of update rule and the action selection. In this study, we organize a new architecture for multi-state reinforcement learning as a parallel array of bandit problems in order to benefit from photonic decision-makers, which we call parallel bandit architecture for reinforcement learning or PBRL in short. Taking a cart-pole balancing problem as an instance, we demonstrate that PBRL adapts to the environment in fewer time steps than Q-learning. Furthermore, PBRL yields faster adaptation when operated with a chaotic laser time series than the case with uniformly distributed pseudorandom numbers where the autocorrelation inherent in the laser chaos provides a positive effect. We also find that the variety of states that the system undergoes during the learning phase exhibits completely different properties between PBRL and Q-learning. The insights obtained through the present study are also beneficial for existing computing platforms, not just photonic realizations, in accelerating performances by the PBRL algorithms and correlated random sequences.
  IOP Publishing, Scientific journal
  DOI：https://doi.org/10.1088/2399-6528/ac75ad
  DOI ID：10.1088/2399-6528/ac75ad, eISSN：2399-6528
• Decision making for large-scale multi-armed bandit problems using bias control of chaotic temporal waveforms in semiconductor lasers　　　　　　　　　　　　　　　
  K. Morijiri; T. Mihana; K. Kanno; M. Naruse; A. Uchida
  Scientific Reports, Volume：12, Number：Article No. 8073, First page：8073, Last page：11, May 2022, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1038/s41598-022-12155-y
  DOI ID：10.1038/s41598-022-12155-y
• Photonic reinforcement learning based on optoelectronic reservoir computing　　　　　　　　　　　　　　　
  K. Kanno and A. Uchida
  Scientific Reports, Volume：Vol. 12, Number：Article No. 3720, First page：1, Last page：11, 2022
• 光の極限性能を生かすフォトニックコンピューティング ―光を用いた意思決定― (招待論文)　　　　　　　　　　　　　　　
  成瀬 誠, 内田 淳史, 内山 和治, 赤羽 浩一
  IEICE Fundamentals Review, Volume：Vol. 15, Number：No. 4, First page：310, Last page：317, 2022
• Reservoir computing based on an external-cavity semiconductor laser with optical feedback modulation　　　　　　　　　　　　　　　
  K. Kanno, A. A. Haya, and A. Uchida
  Optics Express, Volume：Vol. 30, Number：No. 19, First page：34218, Last page：34238, 2022
• Photonic decision making for solving competitive multi-armed bandit problem using semiconductor laser networks
  Takatomo Mihana; Kazutaka Kanno; Makoto Naruse; Atsushi Uchida
  Nonlinear Theory and Its Applications, IEICE, Volume：13, Number：3, First page：582, Last page：597, 2022
  Institute of Electronics, Information and Communications Engineers (IEICE), Scientific journal
  DOI：https://doi.org/10.1587/nolta.13.582
  DOI ID：10.1587/nolta.13.582, eISSN：2185-4106
• Experimental demonstration of adaptive model selection based on reinforcement learning in photonic reservoir computing
  Ryohei Mito; Kazutaka Kanno; Makoto Naruse; Atsushi Uchida
  Nonlinear Theory and Its Applications, IEICE, Volume：13, Number：1, First page：123, Last page：138, 2022
  Institute of Electronics, Information and Communications Engineers (IEICE), Scientific journal
  DOI：https://doi.org/10.1587/nolta.13.123
  DOI ID：10.1587/nolta.13.123, eISSN：2185-4106
• Adaptive decision making using a chaotic semiconductor laser for multi-armed bandit problem with time-varying hit probabilities
  Akihiro Oda; Takatomo Mihana; Kazutaka Kanno; Makoto Naruse; Atsushi Uchida
  Nonlinear Theory and Its Applications, IEICE, Volume：13, Number：1, First page：112, Last page：122, 2022
  Institute of Electronics, Information and Communications Engineers (IEICE), Scientific journal
  DOI：https://doi.org/10.1587/nolta.13.112
  DOI ID：10.1587/nolta.13.112, eISSN：2185-4106
• Photonic neural field on a silicon chip: Large-scale, high-speed neuro-inspired computing and sensing　　　　　　　　　　　　　　　
  Satoshi Sunada; Atsushi Uchida
  Optica, Volume：8, Number：11, First page：1388, Last page：13196, Nov. 2021
  Photonic neural networks have significant potential for high-speed neural processing with low latency and ultralow energy consumption. However, the on-chip implementation of a large-scale neural network is still challenging owing to its low scalability. Herein, we propose the concept of a photonic neural field and implement it experimentally on a silicon chip to realize highly scalable neuro-inspired computing. In contrast to existing photonic neural networks, the photonic neural field is a spatially continuous field that nonlinearly responds to optical inputs, and its high spatial degrees of freedom allow for large-scale and high-density neural processing on a millimeter-scale chip. In this study, we use the on-chip photonic neural field as a reservoir of information and demonstrate a high-speed chaotic time-series prediction with low errors using a training approach similar to reservoir computing. We show that the photonic neural field is potentially capable of executing more than one peta multiply–accumulate operations per second for a single input wavelength on a footprint as small as a few square millimeters. The operation of the neural field is energy efficient due to a passive scattering process, for which the required power comes only from the optical input. We also show that in addition to processing, the photonic neural field can be used for rapidly sensing the temporal variation of an optical phase, facilitated by its high sensitivity to optical inputs. The merging of optical processing with optical sensing paves the way for an end-to-end data-driven optical sensing scheme.
  Scientific journal
  DOI：https://doi.org/10.1364/OPTICA.434918
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85120381669&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85120381669&origin=inward
  DOI ID：10.1364/OPTICA.434918, ISSN：2334-2536, SCOPUS ID：85120381669
• High-entropy chaos generation using semiconductor lasers subject to intensity-modulated optical injection for certified physical random number generation　　　　　　　　　　　　　　　
  Chin-Hao Tseng; Ryo Funabashi; Kazutaka Kanno; Atsushi Uchida; Chia-Chien Wei; Sheng-Kwang Hwang
  Optics Letters, Volume：46, Number：14, First page：3384, Last page：3387, Jul. 2021
  This study investigates high-entropy chaos generation using a semiconductor laser subject to intensity-modulated optical injection for certified physical random number generation. Chaos with a continuous spectral profile that is not only widely distributed but also broadly flattened over a bandwidth of 33 GHz is generated. The former suggests that the chaos can be sampled at a high rate while keeping sufficient un-correlation between data samples, and the latter indicates that the chaos possesses high entropy, both of which enhance the generation rate of physical random numbers with guaranteed unpredictability. A minimum entropy value of 2.19 bits/sample is obtained without any post-processing and by excluding the contribution from measurement noise, suggesting that, to the least extent, the chaotic source can be used as a 2-bit physical random number generator at a rate of 160 Gbits/s.
  The Optical Society, English, Scientific journal
  DOI：https://doi.org/10.1364/OL.431054
  DOI ID：10.1364/OL.431054, ISSN：1539-4794, PubMed ID：34264219, SCOPUS ID：85110238103
• Fast dynamics of low-frequency fluctuations in a quantum-dot laser with optical feedback
  Kazuto Yamasaki; Kazutaka Kanno; Atsushi Matsumoto; Kouichi Akahane; Naokatsu Yamamoto; Makoto Naruse; Atsushi Uchida
  Optics Express, Volume：29, Number：12, First page：17962, Last page：17962, Jun. 2021
  The Optical Society, Scientific journal
  DOI：https://doi.org/10.1364/oe.426268
  DOI ID：10.1364/oe.426268, eISSN：1094-4087
• Identification of optimal solution in multi-armed bandit problems by interspecific competition dynamics　　　　　　　　　　　　　　　
  Niiyama Tomoaki; Furuhata Genki; Uchida Atsushi; Naruse Makoto; Sunada Satoshi
  JSAP Annual Meetings Extended Abstracts, Volume：2021.1, First page：272, Last page：272, Feb. 2021
  The Japan Society of Applied Physics, Japanese
  DOI：https://doi.org/10.11470/jsapmeeting.2021.1.0_272
  DOI ID：10.11470/jsapmeeting.2021.1.0_272, eISSN：2436-7613
• Entropy rate of chaos in an optically injected semiconductor laser for physical random number generation　　　　　　　　　　　　　　　
  Yu Kawaguchi; Tomohiko Okuma; Kazutaka Kanno; Atsushi Uchida
  Optics Express, Volume：29, Number：2, First page：2442, Last page：2457, Jan. 2021
  We evaluate the (ε, τ) entropy of chaotic laser outputs generated by an optically injected semiconductor laser for physical random number generation. The vertical resolution ε and sampling time τ are numerically optimized by comparing the (ε, τ) entropy with the Kolmogorov–Sinai entropy, which is estimated from the Lyapunov exponents using linearized model equations. We then investigate the dependence of the (ε, τ) entropy on the optical injection strength of the laser system. In addition, we evaluate the (ε, τ) entropy from the experimentally obtained chaotic temporal waveforms in an optically injected semiconductor laser. Random bits with an entropy close to one bit per sampling point are extracted to satisfy the conditions of physical random number generation. We find that the extraction of the third-most significant bit from eight-bit experimental chaotic data results in an entropy of one bit per sample for certified physical random number generation.
  OSA - The Optical Society, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.411694
  DOI ID：10.1364/OE.411694, ISSN：1094-4087, PubMed ID：33726439, SCOPUS ID：85100009736
• Performance Improvement of Delay-Based Photonic Reservoir Computing　　　　　　　　　　　　　　　
  Kazutaka Kanno; Atsushi Uchida
  Natural Computing Series, First page：377, Last page：396, 2021
  The techniques for performance improvement of delay-based reservoir computing with photonic systems are proposed and summarized. A chaos input mask signal is introduced to improve the performance of a time-series prediction task. A photonic integrated circuit is used to miniaturize the reservoir computing system. The performance of reservoir computing is compared between a single electro-optic system and a mutually coupled electro-optic system.
  Springer Science and Business Media Deutschland GmbH, English, In book
  DOI：https://doi.org/10.1007/978-981-13-1687-6_16
  DOI ID：10.1007/978-981-13-1687-6_16, ISSN：1619-7127, SCOPUS ID：85112503422
• Laser network decision making by lag synchronization of chaos in a ring configuration
  Takatomo Mihana; Kiyohiro Fujii; Kazutaka Kanno; Makoto Naruse; Atsushi Uchida
  Optics Express, Volume：28, Number：26, First page：40112, Last page：40112, Dec. 2020
  The Optical Society, Scientific journal
  DOI：https://doi.org/10.1364/oe.411140
  DOI ID：10.1364/oe.411140, eISSN：1094-4087
• Adaptive model selection in photonic reservoir computing by reinforcement learning
  Kazutaka Kanno; Makoto Naruse; Atsushi Uchida
  Scientific Reports, Volume：10, Number：1, First page：1, Last page：12, Dec. 2020
  Springer Science and Business Media LLC, Scientific journal
  DOI：https://doi.org/10.1038/s41598-020-66441-8
  DOI ID：10.1038/s41598-020-66441-8, eISSN：2045-2322
• Using multidimensional speckle dynamics for high-speed, large-scale, parallel photonic computing　　　　　　　　　　　　　　　
  Satoshi Sunada; Kazutaka Kanno; Atsushi Uchida
  OPTICS EXPRESS, Volume：28, Number：21, First page：30349, Last page：30361, Oct. 2020
  The recent rapid increase in demand for data processing has resulted in the need for novel machine learning concepts and hardware. Physical reservoir computing and an extreme learning machine are novel computing paradigms based on physical systems themselves, where the high dimensionality and nonlinearity play a crucial role in the information processing. Herein, we propose the use of multidimensional speckle dynamics in multimode fibers for information processing, where input information is mapped into the space, frequency, and time domains by an optical phase modulation technique. The speckle-based mapping of the input information is high-dimensional and nonlinear and can be realized at the speed of light; thus, nonlinear time-dependent information processing can successfully be achieved at fast rates when applying a reservoir-computing-like-approach. As a proof-of-concept, we experimentally demonstrate chaotic time-series prediction at input rates of 12.5 Gigasamples per second. Moreover, we show that owing to the passivity of multimode fibers, multiple tasks can be simultaneously processed within a single system, i.e., multitasking. These results offer a novel approach toward realizing parallel, high-speed, and large-scale photonic computing. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.399495
  DOI ID：10.1364/OE.399495, ISSN：1094-4087, Web of Science ID：WOS:000581089500002
• Reservoir computing and decision making using laser dynamics for photonic accelerator　　　　　　　　　　　　　　　
  Atsushi Uchida; Kazutaka Kanno; Satoshi Sunada; Makoto Naruse
  JAPANESE JOURNAL OF APPLIED PHYSICS, Volume：59, Number：4, First page：040601, Last page：1-12, Apr. 2020
  The photonic accelerator is a new paradigm of photonic technologies for artificial intelligence, wherein the systems can accelerate information processing in electronic computing. Schemes for reservoir computing and decision making are promising examples of the photonic accelerator. In this work, we describe recent advances in the architectures of reservoir computing and decision making based on complex photonics, wherein the physics of light, including ultrafast dynamics in semiconductor lasers with optical feedback, plays a crucial role in the photonic accelerator.
  IOP PUBLISHING LTD, English, Scientific journal
  DOI：https://doi.org/10.35848/1347-4065/ab7860
  DOI ID：10.35848/1347-4065/ab7860, ISSN：0021-4922, eISSN：1347-4065, Web of Science ID：WOS:000520142700001
• Effects of complex dynamics for the best arm identification in multi-armed bandit problems　　　　　　　　　　　　　　　
  Kochi Satoshi; Niiyama Tomoaki; Uchida Atsushi; Naruse Makoto; Sunada Satoshi
  JSAP Annual Meetings Extended Abstracts, Volume：2020.1, First page：945, Last page：945, Feb. 2020
  The Japan Society of Applied Physics, Japanese
  DOI：https://doi.org/10.11470/jsapmeeting.2020.1.0_945
  DOI ID：10.11470/jsapmeeting.2020.1.0_945, eISSN：2436-7613
• Entropy evaluation of white chaos generated by optical heterodyne for certifying physical random number generators　　　　　　　　　　　　　　　
  Keigo Yoshiya; Yuta Terashima; Kazutaka Kanno; Atsushi Uchida
  Optics Express, Volume：28, Number：3, First page：3686, Last page：3698, Feb. 2020
  The entropy of white chaos is evaluated to certify physical random number generators. White chaos is generated from the electric subtraction of two optical heterodyne signals of two chaotic outputs in semiconductor lasers with optical feedback. We use the statistical test suites of NIST Special Publication 800-90B for the evaluation of physical entropy sources of white chaos with an eight-bit resolution. The minimum value of entropy is 2.1 for eight most significant bits data. The entropy of white chaos is enhanced from that of the chaotic output of the semiconductor lasers. We evaluate the effect of detection noise and distinguish between the entropy that originates from the white chaos and the detection noise. It is found that the entropy of five most significant bits originates from white chaos. The minimum value of entropy is 1.1 for five most significant bits data, and it is considered that the entropy can be obtained at at least one bit per sample.
  OSA - The Optical Society, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.382234
  DOI ID：10.1364/OE.382234, ISSN：1094-4087, PubMed ID：32122032, SCOPUS ID：85078824222
• Lotka–Volterra Competition Mechanism Embedded in a Decision-Making Method
  Tomoaki Niiyama; Genki Furuhata; Atsushi Uchida; Makoto Naruse; Satoshi Sunada
  Journal of the Physical Society of Japan, Volume：89, Number：1, First page：014801, Last page：014801, Jan. 2020
  Physical Society of Japan, Scientific journal
  DOI：https://doi.org/10.7566/jpsj.89.014801
  DOI ID：10.7566/jpsj.89.014801, ISSN：0031-9015, eISSN：1347-4073
• 光を用いた意思決定機能　　　　　　　　　　　　　　　
  成瀬 誠, Nicolas Chauvet, 内田 淳史, 砂田 哲, 内山 和治, 長谷川 幹雄, 堀 裕和
  光アライアンス (解説論文), Volume：Vol. 31, No. 3, First page：13, Last page：16, 2020
• 光結合レーザーを用いたリザーバコンピューティングの情報処理性能とリアプノフ安定性の関係　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史
  レーザー研究, Volume：Vol. 48, Number：No. 5, First page：259, Last page：264, 2020
• 光を用いた意思決定メカニズム　　　　　　　　　　　　　　　
  成瀬 誠, Nicolas Chauvet, 内田 淳史, 砂田 哲, 内山 和治, 長谷川 幹雄, 堀 裕和
  電子情報通信学会誌 (解説論文), Volume：Vol. 103, No. 3, First page：290, Last page：297, 2020
• 相互結合システムを用いた光リザーバコンピューティングによる時系列予測性能の向上　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史
  光アライアンス (解説論文), Volume：Vol. 31, No. 3, First page：9, Last page：12, 2020
• Reservoir Computing Using Multiple Lasers With Feedback on a Photonic Integrated Circuit　　　　　　　　　　　　　　　
  Sugano Chihiro; Kanno Kazutaka; Uchida Atsushi
  IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, Volume：26, Number：1, First page：1500409, Last page：1-9, Jan. 2020, [Reviewed]
  DOI：https://doi.org/10.1109/JSTQE.2019.2929179
  DOI ID：10.1109/JSTQE.2019.2929179, ISSN：1077-260X, Web of Science ID：WOS:000481981400001
• Dynamic channel selection in wireless communications via a multi-armed bandit algorithm using laser chaos time series　　　　　　　　　　　　　　　
  S. Takeuchi; M. Hasegawa; K. Kanno; A. Uchida; N. Chauvet; M. Naruse
  Scientific Reports, Volume：10, Number：1574, First page：1, Last page：7, Jan. 2020, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1038/s41598-020-58541-2
  DOI ID：10.1038/s41598-020-58541-2
• Decision Making Photonics: Solving Bandit Problems Using Photons
  Makoto Naruse; Nicolas Chauvet; Atsushi Uchida; Aurelien Drezet; Guillaume Bachelier; Serge Huant; Hirokazu Hori
  IEEE Journal of Selected Topics in Quantum Electronics, Volume：26, Number：1, First page：1, Last page：10, Jan. 2020
  Institute of Electrical and Electronics Engineers (IEEE), Scientific journal
  DOI：https://doi.org/10.1109/jstqe.2019.2929217
  DOI ID：10.1109/jstqe.2019.2929217, ISSN：1077-260X, eISSN：1558-4542
• Photonic reservoir computing based on nonlinear wave dynamics at microscale　　　　　　　　　　　　　　　
  Satoshi Sunada; Atsushi Uchida
  Scientific Reports, Volume：9, Number：1, First page：1, Last page：10, Dec. 2019
  High-dimensional nonlinear dynamical systems, including neural networks, can be utilized as computational resources for information processing. In this sense, nonlinear wave systems are good candidates for such computational resources. Here, we propose and numerically demonstrate information processing based on nonlinear wave dynamics in microcavity lasers, i.e., optical spatiotemporal systems at microscale. A remarkable feature is its ability of high-dimensional and nonlinear mapping of input information to the wave states, enabling efficient and fast information processing at microscale. We show that the computational capability for nonlinear/memory tasks is maximized at the edge of dynamical stability. Moreover, we show that computational capability can be enhanced by applying a time-division multiplexing technique to the wave dynamics. Thus, the computational potential of the wave dynamics can sufficiently be extracted even when the number of detectors to monitor the wave states is limited. In addition, we discuss the merging of optical information processing with optical sensing, revealing a novel method for model-free sensing by using a microcavity reservoir as a sensing element. These results pave a way for on-chip photonic computing with high-dimensional dynamics and a model-free sensing method.
  Nature Research, English, Scientific journal
  DOI：https://doi.org/10.1038/s41598-019-55247-y
  DOI ID：10.1038/s41598-019-55247-y, ISSN：2045-2322, PubMed ID：31836737, SCOPUS ID：85076498722
• Generative adversarial network based on chaotic time series
  Makoto Naruse; Takashi Matsubara; Nicolas Chauvet; Kazutaka Kanno; Tianyu Yang; Atsushi Uchida
  Scientific Reports, Volume：Vol. 9, Article No. 12963, First page：1, Last page：9, Dec. 2019, [Reviewed], ［International magazine］
  Nature, English, Scientific journal
  DOI：https://doi.org/10.1038/s41598-019-49397-2
  DOI ID：10.1038/s41598-019-49397-2, ISSN：2045-2322, ORCID：64008680
• Novel frontier of photonics for data processing - Photonic accelerator　　　　　　　　　　　　　　　
  K. Kitayama; M. Notomi; M. Naruse; K. Inoue; S. Kawakami; A. Uchida
  APL Photonics, Volume：4, Number：090901, First page：1, Last page：24, Sep. 2019, [Reviewed], [Invited]
• Reservoir computing with optical microcavities: large-scale optical network and sensing applications　　　　　　　　　　　　　　　
  Sunada Satoshi; Niiyama Tomoaki; Uchida Atsushi; Arai Kenichi
  JSAP Annual Meetings Extended Abstracts, Volume：2019.1, First page：3824, Last page：3824, Feb. 2019
  The Japan Society of Applied Physics, Japanese
  DOI：https://doi.org/10.11470/jsapmeeting.2019.1.0_3824
  DOI ID：10.11470/jsapmeeting.2019.1.0_3824, eISSN：2436-7613
• 光を用いたリザバーコンピューティングの最新研究動向　　　　　　　　　　　　　　　
  内田 淳史, 菅野 円隆
  電子情報通信学会誌, Volume：Vol. 102, No. 2, First page：127, Last page：133, 2019
• 複雑系フォトニクスを用いた高速物理乱数生成の進展　　　　　　　　　　　　　　　
  内田 淳史
  レーザー研究, Volume：Vol. 47, No. 6, First page：310, Last page：314, 2019
• Numerical study on dynamics-dependent synchronization in mutually-coupled lasers with asymmetric feedback　　　　　　　　　　　　　　　
  S. Ohara, K. Kanno, and A. Uchida
  Nonlinear Theory and Its Applications, IEICE, Volume：Vol. 10, No. 1, First page：60, Last page：73, 2019
• Experimental investigation of nonlinear dynamics and bifurcation in a quantum-dot laser with optical feedback　　　　　　　　　　　　　　　
  Kazuto Yamasaki; Kazutaka Kanno; Atsushi Matsumoto; Makoto Naruse; Naokatsu Yamamoto; Atsushi Uchida
  Optics InfoBase Conference Papers, Volume：2019, 2019
  We investigate the temporal dynamics of a quantum dot laser with optical feedback by changing the injection current and the optical feedback strength. Chaotic oscillations and low frequency fluctuations are observed for a wide region of the two-dimensional bifurcation diagram.
  OSA - The Optical Society, English, International conference proceedings
  DOI：https://doi.org/10.1364/FIO.2019.JTu3A.59
  DOI ID：10.1364/FIO.2019.JTu3A.59, SCOPUS ID：85084517324
• Parallelization in reservoir computing based on a mutually coupled electro-optic delay system　　　　　　　　　　　　　　　
  Kento Saito; Kazutaka Kanno; Atsushi Uchida
  Optics InfoBase Conference Papers, Volume：2019, 2019
  We propose reservoir computing based on a mutually coupled electro-optic delay system. We experimentally show that the performance of reservoir computing can be improved using the mutually coupled system.
  OSA - The Optical Society, English, International conference proceedings
  DOI：https://doi.org/10.1364/FIO.2019.JW3A.100
  DOI ID：10.1364/FIO.2019.JW3A.100, SCOPUS ID：85084506711
• Implementation of optical feedback modulation in photonic reservoir computing　　　　　　　　　　　　　　　
  Afeeqah Amalina Haya; Chihiro Sugano; Kazutaka Kanno; Atsushi Uchida
  Optics InfoBase Conference Papers, Volume：2019, 2019
  We experimentally investigate photonic reservoir computing using a single semiconductor laser with time-delayed feedback modulation. We perform the time-series prediction task and achieve better results using phase modulation than those using intensity modulation.
  OSA - The Optical Society, English, International conference proceedings
  DOI：https://doi.org/10.1364/FIO.2019.JW3A.95
  DOI ID：10.1364/FIO.2019.JW3A.95, SCOPUS ID：85084475705
• Decision making using lag synchronization of chaos in mutually-coupled semiconductor lasers　　　　　　　　　　　　　　　
  Takatomo Mihana; Yusuke Mitsui; Mizuho Takabayashi; Kazutaka Kanno; Makoto Naruse; Atsushi Uchida
  Optics InfoBase Conference Papers, Volume：2019, 2019
  Photonic reinforcement learning and decision making has been used to solve multi-armed bandit problem. We propose a method of decision making using lag synchronization of chaos in mutually-coupled semiconductor lasers. We numerically investigate the performance of decision making by changing the sampling interval of chaotic temporal waveforms.
  OSA - The Optical Society, English, International conference proceedings
  DOI：https://doi.org/10.1364/FIO.2019.JW4A.104
  DOI ID：10.1364/FIO.2019.JW4A.104, SCOPUS ID：85084432179
• On-chip photonic decision maker using spontaneous mode switching in a ring laser　　　　　　　　　　　　　　　
  R. Homma; S. Kochi; T. Niiyama; T. Mihana; Y. Mitsui; K. Kanno; A. Uchida; M. Naruse; S. Sunada
  Scientific Reports, Volume：9, Number：9429, First page：1, Last page：9, 2019, [Reviewed]
  DOI：https://doi.org/10.1038/s41598-019-45754-3
  DOI ID：10.1038/s41598-019-45754-3
• Decision making for the multi-armed bandit problem using lag synchronization of chaos in mutually coupled semiconductor lasers　　　　　　　　　　　　　　　
  T. Mihana; Y. Mitsui; M. Takabayashi; K. Kanno; S. Sunada; M. Naruse; A. Uchida
  Optics Express, Volume：27, Number：19, First page：26989, Last page：27008, 2019, [Reviewed]
  DOI：https://doi.org/10.1364/OE.27.026989
  DOI ID：10.1364/OE.27.026989
• Compact reservoir computing with a photonic integrated circuit　　　　　　　　　　　　　　　
  Takano Kosuke; Sugano Chihiro; Inubushi Masanobu; Yoshimura Kazuyuki; Sunada Satoshi; Kanno Kazutaka; Uchida Atsushi
  OPTICS EXPRESS, Volume：26, Number：22, First page：29424, Last page：29439, Oct. 2018, [Reviewed]
  DOI：https://doi.org/10.1364/OE.26.029424
  DOI ID：10.1364/OE.26.029424, ISSN：1094-4087, Web of Science ID：WOS:000448556300115
• Scalable photonic reinforcement learning by time-division multiplexing of laser chaos.　　　　　　　　　　　　　　　
  Makoto Naruse; Takatomo Mihana; Hirokazu Hori; Hayato Saigo; Kazuya Okamura; Mikio Hasegawa; Atsushi Uchida
  Scientific reports, Volume：8, Number：1, First page：10890, Last page：10890, Jul. 2018, ［International magazine］
  Reinforcement learning involves decision-making in dynamic and uncertain environments and constitutes a crucial element of artificial intelligence. In our previous work, we experimentally demonstrated that the ultrafast chaotic oscillatory dynamics of lasers can be used to efficiently solve the two-armed bandit problem, which requires decision-making concerning a class of difficult trade-offs called the exploration-exploitation dilemma. However, only two selections were employed in that research; hence, the scalability of the laser-chaos-based reinforcement learning should be clarified. In this study, we demonstrated a scalable, pipelined principle of resolving the multi-armed bandit problem by introducing time-division multiplexing of chaotically oscillated ultrafast time series. The experimental demonstrations in which bandit problems with up to 64 arms were successfully solved are presented where laser chaos time series significantly outperforms quasiperiodic signals, computer-generated pseudorandom numbers, and coloured noise. Detailed analyses are also provided that include performance comparisons among laser chaos signals generated in different physical conditions, which coincide with the diffusivity inherent in the time series. This study paves the way for ultrafast reinforcement learning by taking advantage of the ultrahigh bandwidths of light wave and practical enabling technologies.
  English, Scientific journal
  DOI：https://doi.org/10.1038/s41598-018-29117-y
  DOI ID：10.1038/s41598-018-29117-y, PubMed ID：30022085, PubMed Central ID：PMC6052166
• Effect of bandwidth limitation of optical noise injection on common-signal-induced synchronization in multi-mode semiconductor lasers　　　　　　　　　　　　　　　
  Makoto Tomiyama; Kazuto Yamasaki; Kenichi Arai; Masanobu Inubushi; Kazuyuki Yoshimura; Atsushi Uchida
  Optics Express, Volume：26, Number：10, First page：13521, Last page：13535, May 2018, [Reviewed]
  We investigate common-signal-induced synchronization in two multi-mode semiconductor lasers subject to a bandwidth-limited optical noise signal. Synchronization can be achieved when the number of longitudinal modes is matched between the two lasers. The peak wavelengths need to be matched between the two lasers to achieve synchronization. In contrast, small correlation is observed when the peak wavelengths are mismatched. The synchronization is degraded as the number of longitudinal modes in one of the lasers is decreased. However, large correlation is obtained if the overlapped modes are selected and compared. We discuss the possibility of an unauthorized user reproducing the synchronized waveforms. It is difficult to completely reproduce the synchronized waveforms using synchronization if the bandwidth of the noise drive signal is limited.
  OSA - The Optical Society, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.26.013521
  DOI ID：10.1364/OE.26.013521, ISSN：1094-4087, SCOPUS ID：85047332407, Web of Science ID：WOS:000432457600121
• Erratum: Author Correction: Ultrafast photonic reinforcement learning based on laser chaos (Scientific reports (2017) 7 1 (8772))　　　　　　　　　　　　　　　
  Makoto Naruse; Yuta Terashima; Atsushi Uchida; Song-Ju Kim
  Scientific reports, Volume：8, Number：1, First page：5769, Apr. 2018
  A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.
  NLM (Medline), English, Scientific journal
  DOI：https://doi.org/10.1038/s41598-018-23476-2
  DOI ID：10.1038/s41598-018-23476-2, ISSN：2045-2322, PubMed ID：29622807, SCOPUS ID：85070474627
• 光リザーバコンピューティングの展開　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史
  人工知能, Volume：Vol. 33, No. 5, First page：577, Last page：585, 2018
• Impact of input mask signals on delay-based photonic reservoir computing with semiconductor lasers　　　　　　　　　　　　　　　
  Y. Kuriki, J. Nakayama, K. Takano, and A. Uchida
  Optics Express, Volume：Vol. 26, No. 5, First page：5777, Last page：5788, 2018
• 光を用いた意思決定－バンディット問題を光で解く－　　　　　　　　　　　　　　　
  成瀬 誠, 内田淳史, S. Huant
  人工知能, Volume：Vol. 33, No. 5, First page：592, Last page：599, 2018
• Memory effect on adaptive decision making with a chaotic semiconductor laser　　　　　　　　　　　　　　　
  Takatomo Mihana; Yuta Terashima; Makoto Naruse; Song-Ju Kim; Atsushi Uchida
  Complexity, Volume：2018, First page：4318127, Last page：8, 2018, [Reviewed]
  We investigate the effect of a memory parameter on the performance of adaptive decision making using a tug-of-war method with the chaotic oscillatory dynamics of a semiconductor laser. We experimentally generate chaotic temporal waveforms of the semiconductor laser with optical feedback and apply them for adaptive decision making in solving a multiarmed bandit problem that aims at maximizing the total reward from slot machines whose hit probabilities are dynamically switched. We examine the dependence of making correct decisions on different values of the memory parameter. The degree of adaptivity is found to be enhanced with a smaller memory parameter, whereas the degree of convergence to the correct decision is higher for a larger memory parameter. The relations among the adaptivity, environmental changes, and the difficulties of the problem are also discussed considering the requirement of past decisions. This examination of ultrafast adaptive decision making highlights the importance of memorizing past events and paves the way for future photonic intelligence.
  Hindawi Limited, English, Scientific journal
  DOI：https://doi.org/10.1155/2018/4318127
  DOI ID：10.1155/2018/4318127, ISSN：1099-0526, SCOPUS ID：85045748197
• Random Number Generation from Intermittent Optical Chaos　　　　　　　　　　　　　　　
  Andreas Karsaklian Dal Bosco; Naoki Sato; Yuta Terashima; Shoma Ohara; Atsushi Uchida; Takahisa Harayama; Masanobu Inubushi
  IEEE Journal of Selected Topics in Quantum Electronics, Volume：23, Number：6, First page：1801208, Last page：1-8, Nov. 2017
  We propose a method to generate physical random numbers based on intermittent optical chaos. Intermittent chaotic output is produced in a semiconductor laser subjected to optical feedback embedded in a photonic integrated circuit. This dynamics is characterized by a temporal waveform organized in a succession of laminar regions of low amplitude and bursts of high amplitude. The temporal randomness ruling the alternation of successive laminar regions and bursts is used as an entropy source to generate sequences of random bits. We compare the performances of the exclusive OR and reverse methods implemented in the bit generation process and evaluate the quality of the random bits with the Rabbit test of TestU01 for different bit sequences lengths.
  Scientific journal
  DOI：https://doi.org/10.1109/JSTQE.2017.2708608
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85028390240&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85028390240&origin=inward
  DOI ID：10.1109/JSTQE.2017.2708608, ISSN：0792-1233, eISSN：2191-0359, SCOPUS ID：85028390240
• Common-Signal-Induced Synchronization in Semiconductor Lasers With Broadband Optical Noise Signal
  Nobumitsu Suzuki; Takuya Hida; Makoto Tomiyama; Atsushi Uchida; Kazuyuki Yoshimura; Kenichi Arai; Masanobu Inubushi
  IEEE Journal of Selected Topics in Quantum Electronics, Volume：23, Number：6, First page：1, Last page：10, Nov. 2017
  Institute of Electrical and Electronics Engineers (IEEE), Scientific journal
  DOI：https://doi.org/10.1109/jstqe.2017.2690821
  DOI ID：10.1109/jstqe.2017.2690821, ISSN：1077-260X, eISSN：1558-4542
• Common-signal-induced synchronization in photonic integrated circuits and its application to secure key distribution　　　　　　　　　　　　　　　
  Takuma Sasaki; Izumi Kakesu; Yusuke Mitsui; Damien Rontani; Atsushi Uchida; Satoshi Sunada; Kazuyuki Yoshimura; Masanobu Inubushi
  OPTICS EXPRESS, Volume：25, Number：21, First page：26029, Last page：26044, Oct. 2017, [Reviewed]
  We experimentally achieve common-signal-induced synchronization in two photonic integrated circuits with short external cavities driven by a constant-amplitude random-phase light. The degree of synchronization can be controlled by changing the optical feedback phase of the two photonic integrated circuits. The change in the optical feedback phase leads to a significant redistribution of the spectral energy of optical and RF spectra, which is a unique characteristic of PICs with the short external cavity. The matching of the RF and optical spectra is necessary to achieve synchronization between the two PICs, and stable synchronization can be obtained over an hour in the presence of optical feedback. We succeed in generating information-theoretic secure keys and achieving the final key generation rate of 184 kb/s using the PICs. (C) 2017 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.25.026029
  DOI ID：10.1364/OE.25.026029, ISSN：1094-4087, Web of Science ID：WOS:000413103300108
• Dynamics-dependent synchronization in on-chip coupled semiconductor lasers　　　　　　　　　　　　　　　
  Shoma Ohara; Andreas Karsaklian Dal Bosco; Kazusa Ugajin; Atsushi Uchida; Takahisa Harayama; Masanobu Inubushi
  PHYSICAL REVIEW E, Volume：96, Number：3, First page：032216, Last page：1-9, Sep. 2017, [Reviewed]
  Synchronization properties of chaotic dynamics in two mutually coupled semiconductor lasers with optical feedback embedded in a photonic integrated circuit are investigated from the point of view of their dynamical content. A phenomenon in which the two lasers can show qualitatively different synchronization properties according to the frequency range of investigation and their nonlinear dynamics is identified and termed dynamics-dependent synchronization. In-phase synchronization is observed for original signals and antiphase synchronization is observed for low-pass filtered signals in the case where one of the lasers shows chaotic oscillations while the other laser exhibits low-frequency fluctuations dynamics. The experimental conditions causing the synchronization states to vary according to the considered frequency interval are studied and the key roles of asymmetric coupling strength and injection currents are clarified.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.96.032216
  DOI ID：10.1103/PhysRevE.96.032216, ISSN：2470-0045, eISSN：2470-0053, Web of Science ID：WOS:000411087600007
• Ultrafast photonic reinforcement learning based on laser chaos　　　　　　　　　　　　　　　
  Makoto Naruse; Yuta Terashima; Atsushi Uchida; Song-Ju Kim
  SCIENTIFIC REPORTS, Volume：7, Number：8772, First page：8772, Last page：10, Aug. 2017, [Reviewed]
  Reinforcement learning involves decision making in dynamic and uncertain environments and constitutes an important element of artificial intelligence (AI). In this work, we experimentally demonstrate that the ultrafast chaotic oscillatory dynamics of lasers efficiently solve the multi-armed bandit problem (MAB), which requires decision making concerning a class of difficult trade-offs called the exploration-exploitation dilemma. To solve the MAB, a certain degree of randomness is required for exploration purposes. However, pseudorandom numbers generated using conventional electronic circuitry encounter severe limitations in terms of their data rate and the quality of randomness due to their algorithmic foundations. We generate laser chaos signals using a semiconductor laser sampled at a maximum rate of 100 GSample/s, and combine it with a simple decision-making principle called tug of war with a variable threshold, to ensure ultrafast, adaptive, and accurate decision making at a maximum adaptation speed of 1 GHz. We found that decision-making performance was maximized with an optimal sampling interval, and we highlight the exact coincidence between the negative autocorrelation inherent in laser chaos and decision-making performance. This study paves the way for a new realm of ultrafast photonics in the age of AI, where the ultrahigh bandwidth of light wave can provide new value.
  NATURE PUBLISHING GROUP, English, Scientific journal
  DOI：https://doi.org/10.1038/s41598-017-08585-8
  DOI ID：10.1038/s41598-017-08585-8, ISSN：2045-2322, Web of Science ID：WOS:000407980000026
• Physical implementation of oblivious transfer using optical correlated randomness　　　　　　　　　　　　　　　
  Tomohiro Ito; Hayato Koizumi; Nobumitsu Suzuki; Izumi Kakesu; Kento Iwakawa; Atsushi Uchida; Takeshi Koshiba; Jun Muramatsu; Kazuyuki Yoshimura; Masanobu Inubushi; Peter Davis
  SCIENTIFIC REPORTS, Volume：7, First page：1, Last page：12, Aug. 2017, [Reviewed]
  We demonstrate physical implementation of information-theoretic secure oblivious transfer based on bounded observability using optical correlated randomness in semiconductor lasers driven by common random light broadcast over optical fibers. We demonstrate that the scheme can achieve one-out-of-two oblivious transfer with effective key generation rate of 110 kb/s. The results show that this scheme is a promising approach to achieve information-theoretic secure oblivious transfer over long distances for future applications of secure computation such as privacy-preserving database mining, auctions and electronic-voting.
  NATURE PUBLISHING GROUP, English, Scientific journal
  DOI：https://doi.org/10.1038/s41598-017-08229-x
  DOI ID：10.1038/s41598-017-08229-x, ISSN：2045-2322, Web of Science ID：WOS:000407677300019
• Spontaneous exchange of leader-laggard relationship in mutually coupled synchronized semiconductor lasers　　　　　　　　　　　　　　　
  Kazutaka Kanno; Takuya Hida; Atsushi Uchida; Masatoshi Bunsen
  PHYSICAL REVIEW E, Volume：95, Number：5, First page：052212-1, Last page：12, May 2017, [Reviewed]
  We investigate the instantaneous behavior of synchronized temporal wave forms in two mutually coupled semiconductor lasers numerically and experimentally. The temporal wave forms of two lasers are synchronized with a propagation delay time, with one laser oscillating in advance of the other, known as the leader-laggard relationship. The leader-laggard relationship can be determined by measuring the cross-correlation between the two temporal wave forms with the propagation delay time. The leader can be identified when the optical carrier frequency of the leader laser is higher than that of the other laser. However, spontaneous exchange between the leader and laggard lasers can be observed in low-frequency fluctuations by short-term cross-correlation measurements, even for a fixed initial optical frequency detuning. The spontaneous exchange of the leader-laggard relationship originates from alternation of partial optical frequency locking between the two lasers. This observation is analyzed using a phase space trajectory on steady-state solutions for mutually coupled lasers with optical frequency detuning.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.95.052212
  DOI ID：10.1103/PhysRevE.95.052212, ISSN：2470-0045, eISSN：2470-0053, Web of Science ID：WOS:000401455500004
• Dynamics Versus Feedback Delay Time in Photonic Integrated Circuits: Mapping the Short Cavity Regime　　　　　　　　　　　　　　　
  Andreas Karsaklian Dal Bosco; Shoma Ohara; Naoki Sato; Yasuhiro Akizawa; Atsushi Uchida; Takahisa Harayama; Masanobu Inubushi
  IEEE PHOTONICS JOURNAL, Volume：9, Number：2, First page：6600512, Last page：1-13, Apr. 2017, [Reviewed]
  We report a comprehensive experimental investigation of the nonlinear dynamics yielded in five photonic integrated circuits, each consisting of a semiconductor laser with optical feedback from a short external cavity. The external cavity lengths are different for each laser and range from 1.3 to 10.3 mm, allowing analysis of the dependence of the dynamical scenario on the feedback delay time. We draw two-dimensional bifurcation diagrams and study the relative predominance of the different dynamics exhibited in each laser when the feedback strength and the laser injection current are varied. We identify that, in the commonly termed short cavity regime, small variations of the external cavity length can result in totally different dynamical distributions, suggesting the possibility to use the feedback delay time as a means to control laser behaviors.
  IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, English, Scientific journal
  DOI：https://doi.org/10.1109/JPHOT.2017.2667883
  DOI ID：10.1109/JPHOT.2017.2667883, ISSN：1943-0655, eISSN：1943-0647, Web of Science ID：WOS:000398254600001
• Real-time fast physical random number generator with a photonic integrated circuit　　　　　　　　　　　　　　　
  Kazusa Ugajin; Yuta Terashima; Kento Iwakawa; Atsushi Uchida; Takahisa Harayama; Kazuyuki Yoshimura; Masanobu Inubushi
  OPTICS EXPRESS, Volume：25, Number：6, First page：6511, Last page：6523, Mar. 2017, [Reviewed]
  Random number generators are essential for applications in information security and numerical simulations. Most optical-chaos-based random number generators produce random bit sequences by offline post-processing with large optical components. We demonstrate a real-time hardware implementation of a fast physical random number generator with a photonic integrated circuit and a field programmable gate array (FPGA) electronic board. We generate 1-Tbit random bit sequences and evaluate their statistical randomness using NIST Special Publication 800-22 and TestU01. All of the BigCrush tests in TestU01 are passed using 410-Gbit random bit sequences. A maximum real-time generation rate of 21.1 Gb/s is achieved for random bit sequences in binary format stored in a computer, which can be directly used for applications involving secret keys in cryptography and random seeds in large-scale numerical simulations.
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.25.006511
  DOI ID：10.1364/OE.25.006511, ISSN：1094-4087, Web of Science ID：WOS:000397316200056
• Recommendations and illustrations for the evaluation of photonic random number generators　　　　　　　　　　　　　　　
  J. D. Hart, Y. Terashima, A. Uchida, G. B. Baumgartner, T. E. Murphy, and R. Roy
  APL Photonics, Volume：Vol. 2, First page：090901, Last page：1-22, 2017
• Synchronized laser chaos communication: Statistical investigation of an experimental system　　　　　　　　　　　　　　　
  A. J. Lawrance, T. Papamarkou, and A. Uchida
  IEEE Journal of Quantum Electronics, Volume：Vol. 53, No. 2, First page：8000210, Last page：1-10, 2017
• Common-Signal-Induced Synchronization in Photonic Integrated Circuits Driven by Constant-Amplitude Random-Phase Light　　　　　　　　　　　　　　　
  Takuma Sasaki; Izumi Kakesu; Atsushi Uchida; Satoshi Sunada; Kazuyuki Yoshimura; Kenichi Arai
  International Symposium on Nonlinear Theory and Its Applications, Volume：48, Number：C1L-B-5, First page：566, Last page：569, Nov. 2016, [Reviewed]
  The Institute of Electronics, Information and Communication Engineers, English, International conference proceedings
  DOI：https://doi.org/10.34385/proc.48.C1L-B-5
  DOI ID：10.34385/proc.48.C1L-B-5, ISSN：2188-5079, ORCID：101131028
• Photonic integrated circuits unveil crisis-induced intermittency　　　　　　　　　　　　　　　
  Andreas Karsaklian Dal Bosco; Yasuhiro Akizawa; Kazutaka Kanno; Atsushi Uchida; Takahisa Harayama; Kazuyuki Yoshimura
  OPTICS EXPRESS, Volume：24, Number：19, First page：22198, Last page：22209, Sep. 2016, [Reviewed]
  We experimentally investigate an intermittent route to chaos in a photonic integrated circuit consisting of a semiconductor laser with time-delayed optical feedback from a short external cavity. The transition from a period-doubling dynamics to a fully-developed chaos reveals a stage intermittently exhibiting these two dynamics. We unveil the bifurcation mechanism underlying this route to chaos by using the Lang-Kobayashi model and demonstrate that the process is based on a phenomenon of attractor expansion initiated by a particular distribution of the local Lyapunov exponents. We emphasize on the crucial importance of the distribution of the steady-state solutions introduced by the time-delayed feedback on the existence of this intermittent dynamics. (C) 2016 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.24.022198
  DOI ID：10.1364/OE.24.022198, ISSN：1094-4087, Web of Science ID：WOS:000387537600089
• Laser dynamical reservoir computing with consistency: an approach of a chaos mask signal　　　　　　　　　　　　　　　
  Joma Nakayama; Kazutaka Kanno; Atsushi Uchida
  OPTICS EXPRESS, Volume：24, Number：8, First page：8679, Last page：8692, Apr. 2016, [Reviewed]
  We numerically investigate reservoir computing based on the consistency of a semiconductor laser subjected to optical feedback and injection. We introduce a chaos mask signal as an input temporal mask for reservoir computing and perform a time-series prediction task. We compare the errors of the task obtained from the chaos mask signal with those obtained from other digital and analog masks. The performance of the prediction task can be improved by using the chaos mask signal due to complex dynamical response. (C) 2016 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.24.008679
  DOI ID：10.1364/OE.24.008679, ISSN：1094-4087, Web of Science ID：WOS:000374390300077
• Complexity and bandwidth enhancement in unidirectionally coupled semiconductor lasers with time-delayed optical feedback　　　　　　　　　　　　　　　
  Kazutaka Kanno; Atsushi Uchida; Masatoshi Bunsen
  PHYSICAL REVIEW E, Volume：93, Number：3, First page：032206-1, Last page：11, Mar. 2016, [Reviewed]
  We numerically investigate the frequency bandwidth and the autocorrelation characteristics of chaotic temporal wave forms in unidirectionally coupled semiconductor lasers with time-delayed optical feedback. We evaluate the complexity of the chaotic temporal wave forms by using Lyapunov exponents. We found that larger maximum Lyapunov exponents can be obtained for smaller peak values of the autocorrelation function at the delay time of the optical feedback. On the contrary, the maximum Lyapunov exponent is independent from the frequency bandwidth of the chaotic temporal wave forms.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.93.032206
  DOI ID：10.1103/PhysRevE.93.032206, ISSN：2470-0045, eISSN：2470-0053, Web of Science ID：WOS:000371744600009
• 複雑系フォトニクスを用いたリザーバコンピューティング　　　　　　　　　　　　　　　
  内田 淳史
  フォトニクスニュース（解説論文）, Volume：Vol. 2, No. 3, First page：99, Last page：104, 2016
• Cycles of self-pulsations in a photonic integrated circuit　　　　　　　　　　　　　　　
  Andreas Karsaklian Dal Bosco; Kazutaka Kanno; Atsushi Uchida; Marc Sciamanna; Takahisa Harayama; Kazuyuki Yoshimura
  PHYSICAL REVIEW E, Volume：92, Number：6, First page：062905, Last page：1-062905-9, Dec. 2015, [Reviewed]
  We report experimentally on the bifurcation cascade leading to the appearance of self-pulsation in a photonic integrated circuit in which a laser diode is subjected to delayed optical feedback. We study the evolution of the self-pulsing frequency with the increase of both the feedback strength and the injection current. Experimental observations show good qualitative accordance with numerical results carried out with the Lang-Kobayashi rate equation model. We explain the mechanism underlying the self-pulsations by a phenomenon of beating between successive pairs of external cavity modes and antimodes.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.92.062905
  DOI ID：10.1103/PhysRevE.92.062905, ISSN：1539-3755, eISSN：1550-2376, Web of Science ID：WOS:000366099900012
• Secret-Key Distribution Based on Bounded Observability　　　　　　　　　　　　　　　
  Jun Muramatsu; Kazuyuki Yoshimura; Peter Davis; Atsushi Uchida; Takahisa Harayama
  PROCEEDINGS OF THE IEEE, Volume：103, Number：10, First page：1762, Last page：1780, Oct. 2015, [Reviewed]
  This paper reviews an approach to secret-key distribution based on the bounded observability (BO) model. First, the information-theoretic framework of secret-key agreement from a correlated random source is reviewed. Next, the BO model is introduced. In the context of this model, the BO condition is presented as a necessary and sufficient condition for the possibility of secret-key distribution. This condition describes limits on the information obtained by observation of a random object, and models the practical difficulty of completely observing random physical phenomena. Finally, an implementation of secret-key distribution based on BO in an optical fiber system is described.
  IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, English, Scientific journal
  DOI：https://doi.org/10.1109/JPROC.2015.2462837
  DOI ID：10.1109/JPROC.2015.2462837, ISSN：0018-9219, eISSN：1558-2256, Web of Science ID：WOS:000361683400006
• Inphase and antiphase dynamics of spatially-resolved light intensities emitted by a chaotic broad-area semiconductor laser　　　　　　　　　　　　　　　
  M. Arahata and A. Uchida
  IEEE Selected Topics in Quantum Electronics, Volume：21, Number：6, First page：1800609, Last page：1-1800609-9, 2015
• リザーバコンピューティング：レーザーのダイナミクスを用いた新たな光コンピューティング　　　　　　　　　　　　　　　
  中山 丞真, 菅野 円隆, 文仙 正俊, 内田 淳史
  レーザー研究, Volume：43, Number：6, First page：365, Last page：370, 2015
• ブロードエリア半導体レーザーの時空カオスにおける反位相ダイナミクスの数値解析　　　　　　　　　　　　　　　
  荒幡 真也, 内田 淳史
  レーザー研究, Volume：43, Number：6, First page：393, Last page：398, 2015
• Tb/s physical random bit generation with bandwidth-enhanced chaos in three-cascaded semiconductor lasers　　　　　　　　　　　　　　　
  Ryohsuke Sakuraba; Kento Iwakawa; Kazutaka Kanno; Atsushi Uchida
  OPTICS EXPRESS, Volume：23, Number：2, First page：1470, Last page：1490, Jan. 2015, [Reviewed]
  We experimentally demonstrate fast physical random bit generation from bandwidth-enhanced chaos by using three-cascaded semiconductor lasers. The bandwidth-enhanced chaos is obtained with the standard bandwidth of 35.2 GHz, the effective bandwidth of 26.0 GHz and the flatness of 5.6 dB, whose waveform is used for random bit generation. Two schemes of single-bit and multi-bit extraction methods for random bit generation are carried out to evaluate the entropy rate and the maximum random bit generation rate. For single-bit generation, the generation rate at 20 Gb/s is obtained for physical random bit sequences. For multi-bit generation, the maximum generation rate at 1.2 Tb/s (= 100 GS/s x 6 bits x 2 data) is equivalently achieved for physical random bit sequences whose randomness is verified by using both NIST Special Publication 800-22 and TestU01. (C) 2015 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.23.001470
  DOI ID：10.1364/OE.23.001470, ISSN：1094-4087, Web of Science ID：WOS:000349166100085
• Synchronization induced by common ASE noise in semiconductor lasers　　　　　　　　　　　　　　　
  Kenichi Arai; Kazuyuki Yoshimura; Satoshi Sunada; Atsushi Uchida
  International Symposium on Nonlinear Theory and its Applications, First page：474, Last page：477, Sep. 2014, [Reviewed]
  International conference proceedings
  DOI：https://doi.org/10.34385/proc.46.C1L-E5
  DOI ID：10.34385/proc.46.C1L-E5
• Fast physical random bit generation with photonic integrated circuits with different external cavity lengths for chaos generation　　　　　　　　　　　　　　　
  Rie Takahashi; Yasuhiro Akizawa; Atsushi Uchida; Takahisa Harayama; Ken Tsuzuki; Satoshi Sunada; Kenichi Arai; Kazuyuki Yoshimura; Peter Davis
  OPTICS EXPRESS, Volume：22, Number：10, First page：11727, Last page：11740, May 2014, [Reviewed]
  We generate random bit sequences from chaotic temporal waveforms by using photonic integrated circuits (PICs) with different external cavity lengths. We investigate the condition for generating random bits at different sampling rates of single-bit generation method with the PICs. We succeed in generating certified random bit sequences by using the PIC with 3, 4, 5, or 10-mm-long external cavity, whereas random bits cannot pass all the statistical tests of randomness when the PIC with 1 or 2 mm-long external cavity is used. (C) 2014 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.22.011727
  DOI ID：10.1364/OE.22.011727, ISSN：1094-4087, Web of Science ID：WOS:000336957700036
• Noise Effects on Generalized Chaos Synchronization in Semiconductor Lasers　　　　　　　　　　　　　　　
  Kenichi Arai; Susumu Shinohara; Satoshi Sunada; Kazuyuki Yoshimura; Takahisa Harayama; Atsushi Uchida
  IEICE Proceeding Series, Volume：2, First page：413, Last page：416, Mar. 2014
  The Institute of Electronics, Information and Communication Engineers, Scientific journal
  DOI：https://doi.org/10.15248/proc.2.413
  DOI ID：10.15248/proc.2.413, eISSN：2188-5079
• Finite-time Lyapunov exponents in time-delayed nonlinear dynamical systems　　　　　　　　　　　　　　　
  Kazutaka Kanno; Atsushi Uchida
  PHYSICAL REVIEW E, Volume：89, Number：3, First page：032918, Last page：1-8, Mar. 2014, [Reviewed]
  dynamical systems. We apply the method to the Mackey-Glass model with time-delayed feedback. We investigate the standard deviation of the probability distribution of the finite-time Lyapunov exponents when the finite time or the delay time is changed. It is found that the standard deviation decreases in a power-law scaling with the exponent similar to 0.5 as the finite time or the delay time is increased. Similar results are obtained for the finite-time Lyapunov spectrum.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.89.032918
  DOI ID：10.1103/PhysRevE.89.032918, ISSN：1539-3755, eISSN：1550-2376, Web of Science ID：WOS:000333699300006
• Multiple basins of consistency in noise-driven dynamical system　　　　　　　　　　　　　　　
  H. Yip and A. Uchida
  Nonlinear Theory and Its Applications, IEICE, Volume：5, Number：4, First page：436, Last page：444, 2014
• Information-theoretic secure key distribution based on common random-signal induced synchronization in unidirectionally-coupled cascades of semiconductor lasers　　　　　　　　　　　　　　　
  Hayato Koizumi; Shinichiro Morikatsu; Hiroki Aida; Takahiro Nozawa; Izumi Kakesu; Atsushi Uchida; Kazuyuki Yoshimura; Jun Muramatsu; Peter Davis
  OPTICS EXPRESS, Volume：21, Number：15, First page：17869, Last page：17893, Jul. 2013, [Reviewed]
  It has been proposed that a secure key distribution scheme using correlated random bit sequences can be implemented using common random-signal induced synchronization of semiconductor laser systems. In this scheme it is necessary to use laser systems consisting of multiple cascaded lasers to be secure against a powerful eavesdropper. In this paper, we report the results of an experimental study that demonstrate that the common random-signal induced synchronization is possible in cascaded semiconductor laser systems. We also show that the correlated random bit sequences generated in the synchronized cascaded laser systems can be used to create an information-theoretically secure key between two legitimate users. (C) 2013 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.21.017869
  DOI ID：10.1364/OE.21.017869, ISSN：1094-4087, Web of Science ID：WOS:000322366300049
• Performance of random number generators using noise-based superluminescent diode and chaos-based semiconductor lasers　　　　　　　　　　　　　　　
  T. Yamazaki and A. Uchida
  IEEE Journal of Selected Topics in Quantum Electronics, Volume：19, Number：4, First page：0600309, Last page：1-0600309-9, 2013
• Synchronized semiconductor lasers for secure key distribution　　　　　　　　　　　　　　　
  A. Uchida, H. Koizumi, I. Kakesu, K. Yoshimura, J. Muramatsu, and P. Davis
  SPIE Newsroom, 2013
• Complexity and frequency bandwidth in unidirectionally-coupled semiconductor lasers with optical feedback　　　　　　　　　　　　　　　
  Kazutaka Kanno; Atsushi Uchida
  Optics InfoBase Conference Papers, 2013
  We investigate complexity and frequency bandwidth in coupled semiconductor lasers. The enhancement of the bandwidth does not depend on the complexity, whereas, the second peak of the auto-correlation function is related to the complexity. © OSA 2013.
  Optical Society of America (OSA), English, International conference proceedings
  DOI：https://doi.org/10.1364/fio.2013.ftu3a.11
  DOI ID：10.1364/fio.2013.ftu3a.11, ISSN：2162-2701, SCOPUS ID：85087599691
• Statistical evaluation of correlation for physical random number generation with chaotic semiconductor lasers　　　　　　　　　　　　　　　
  Kento Iwakawa; Kazutaka Kanno; Ryohsuke Sakuraba; Yasuhiro Akizawa; Atsushi Uchida
  Optics InfoBase Conference Papers, 2013
  We propose the bias of the probability of correspondence between a random bit sequence and its delayed bit sequence to evaluate correlation of random bits generated from chaotic semiconductor lasers. © OSA 2013.
  Optical Society of America (OSA), English, International conference proceedings
  DOI：https://doi.org/10.1364/fio.2013.fm3c.5
  DOI ID：10.1364/fio.2013.fm3c.5, ISSN：2162-2701, SCOPUS ID：85085403991
• Secret Key Distribution Based on Bounded Observability　　　　　　　　　　　　　　　
  Muramatsu Jun; Yoshimura Kazuyuki; Davis Peter; Uchida Atsushi; Harayama Takahisa
  Bulletin of the Japan Society for Industrial and Applied Mathematics, Volume：23, Number：1, First page：11, Last page：20, 2013
  This paper reviews a secret key distribution based on 'Bounded Observability.' First, the secret key agreement from correlated sources is introduced. Next, the notion of Bounded Observability is introduced. This notion means the practical difficulty of completely observing physical phenomena that are too fast, or too large, or too complex. Finally, a secret key distribution scheme by using correlated physical randomness in lasers driven by common random light is introduced.
  The Japan Society for Industrial and Applied Mathematics, Japanese
  DOI：https://doi.org/10.11540/bjsiam.23.1_11
  DOI ID：10.11540/bjsiam.23.1_11, ISSN：0917-2270, CiNii Articles ID：110009596998, CiNii Books ID：AN10288886
• Consistency and complexity in coupled semiconductor lasers with time-delayed optical feedback　　　　　　　　　　　　　　　
  Kazutaka Kanno; Atsushi Uchida
  PHYSICAL REVIEW E, Volume：86, Number：6, First page：066202, Last page：1-9, Dec. 2012, [Reviewed]
  Consistency of response in a system driven repeatedly by a complex signal has been observed in many nonlinear dynamical systems. We investigate the consistency of unidirectionally coupled semiconductor lasers with optical feedback and measure the complexity of the entire laser system by using the Lyapunov spectrum. The complexity strongly depends on the degree of consistency. It is found that the complexity of the coupled laser system can be classified into three regions. When the system shows consistency, the complexity of the entire laser system corresponds to that of the solitary drive laser. In the inconsistency region, the complexity of the entire laser system corresponds to the sum of the complexity of the uncoupled drive and response lasers. The complexity increases more than the sum of the two solitary lasers near the boundary of the consistency region, where new dynamical fluctuations appear due to the optical carrier interaction between the two lasers.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.86.066202
  DOI ID：10.1103/PhysRevE.86.066202, ISSN：1539-3755, Web of Science ID：WOS:000311928400003
• Noise amplification by chaotic dynamics in a delayed feedback laser system and its application to nondeterministic random bit generation　　　　　　　　　　　　　　　
  Satoshi Sunada; Takahisa Harayama; Peter Davis; Ken Tsuzuki; Ken-ichi Arai; Kazuyuki Yoshimura; Atsushi Uchida
  CHAOS, Volume：22, Number：4, First page：047513, Last page：1-9, Dec. 2012, [Reviewed]
  We present an experimental method for directly observing the amplification of microscopic intrinsic noise in a high-dimensional chaotic laser system, a laser with delayed feedback. In the experiment, the chaotic laser system is repeatedly switched from a stable lasing state to a chaotic state, and the time evolution of an ensemble of chaotic states starting from the same initial state is measured. It is experimentally demonstrated that intrinsic noises amplified by the chaotic dynamics are transformed into macroscopic fluctuating signals, and the probability density of the output light intensity actually converges to a natural invariant probability density in a strongly chaotic regime. Moreover, with the experimental method, we discuss the application of the chaotic laser systems to physical random bit generators. It is experimentally shown that the convergence to the invariant density plays an important role in nondeterministic random bit generation, which could be desirable for future ultimate secure communication systems. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4754872]
  AMER INST PHYSICS, English, Scientific journal
  DOI：https://doi.org/10.1063/1.4754872
  DOI ID：10.1063/1.4754872, ISSN：1054-1500, Web of Science ID：WOS:000312831600064
• Fast Random Number Generation With Bandwidth-Enhanced Chaotic Semiconductor Lasers at 8 x 50 Gb/s　　　　　　　　　　　　　　　
  Yasuhiro Akizawa; Taiki Yamazaki; Atsushi Uchida; Takahisa Harayama; Satoshi Sunada; Kenichi Arai; Kazuyuki Yoshimura; Peter Davis
  IEEE PHOTONICS TECHNOLOGY LETTERS, Volume：24, Number：12, First page：1042, Last page：1044, Jun. 2012, [Reviewed]
  We propose a scheme for fast random number generation with bandwidth-enhanced chaotic semiconductor lasers. Chaotic laser intensity output and its time-delayed signal are sampled at 50 GigaSample per second and converted into eight-bit values. The order of the eight-bit samples of the time-delayed signal is reversed, and bitwise exclusive-or operation is executed between the bit-order-reversed samples and the original eight-bit samples. With this method, it is not necessary to eliminate any of the bits in eight-bit samples in order to obtain good-quality random bit sequences. The equivalent generation rate of 8 x 50 Gb/s is achieved in an experiment using bandwidth-enhanced chaotic semiconductor lasers.
  IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, English, Scientific journal
  DOI：https://doi.org/10.1109/LPT.2012.2193388
  DOI ID：10.1109/LPT.2012.2193388, ISSN：1041-1135, Web of Science ID：WOS:000304153600003
• Experiment on synchronization of semiconductor lasers by common injection of constant-amplitude random-phase light　　　　　　　　　　　　　　　
  Hiroki Aida; Masaya Arahata; Haruka Okumura; Hayato Koizumi; Atsushi Uchida; Kazuyuki Yoshimura; Jun Muramatsu; Peter Davis
  OPTICS EXPRESS, Volume：20, Number：11, First page：11813, Last page：11829, May 2012, [Reviewed]
  We experimentally and numerically observe the synchronization between two semiconductor lasers induced by common optical injection with constant-amplitude and random-phase modulation in configurations with and without optical feedback. Large cross correlation (similar to 0.9) between the intensity oscillations of the two response lasers can be achieved although the correlation between the drive laser and either one of the two response lasers is very small (similar to 0.2). High quality synchronization is achieved in the presence of optical feedback in response lasers with matched feedback phase offset. We investigate the dependence of synchronization on parameter values over wide parameter ranges. (c) 2012 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.20.011813
  DOI ID：10.1364/OE.20.011813, ISSN：1094-4087, Web of Science ID：WOS:000304403100026
• Theory of fast nondeterministic physical random-bit generation with chaotic lasers　　　　　　　　　　　　　　　
  Takahisa Harayama; Satoshi Sunada; Kazuyuki Yoshimura; Jun Muramatsu; Ken-ichi Arai; Atsushi Uchida; Peter Davis
  PHYSICAL REVIEW E, Volume：85, Number：4, First page：046215, Last page：1-9, Apr. 2012, [Reviewed]
  We theoretically show that completely stochastic fast physical random bit generation at a rate of more than one gigabit per second can be realized by using lasers with optical delayed feedback which creates high-dimensional chaos of laser light outputs. The theory is based on the mixing property of chaos, which transduces microscopic quantum noise of spontaneous emission in lasers into random transitions between discrete macroscopic states.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.85.046215
  DOI ID：10.1103/PhysRevE.85.046215, ISSN：1539-3755, Web of Science ID：WOS:000303191800001
• Secure Key Distribution Using Correlated Randomness in Lasers Driven by Common Random Light　　　　　　　　　　　　　　　
  Kazuyuki Yoshimura; Jun Muramatsu; Peter Davis; Takahisa Harayama; Haruka Okumura; Shinichiro Morikatsu; Hiroki Aida; Atsushi Uchida
  PHYSICAL REVIEW LETTERS, Volume：108, Number：6, First page：070602, Last page：1-5, Feb. 2012, [Reviewed]
  We propose a secure key distribution scheme based on correlated physical randomness in remote optical scramblers driven by common random light. The security of the scheme depends on the practical difficulty of completely observing random optical phenomena. We describe a particular realization using the synchronization of semiconductor lasers injected with common light of randomly varying phase. We experimentally demonstrate the feasibility of the scheme over a distance of 120 km.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevLett.108.070602
  DOI ID：10.1103/PhysRevLett.108.070602, ISSN：0031-9007, Web of Science ID：WOS:000300247100001
• Nonlinear dynamics and chaos synchronization in Mackey-Glass electronic circuits with multiple time-delayed feedback　　　　　　　　　　　　　　　
  M. Tateno and A. Uchida
  Nonlinear Theory and Its Applications, IEICE, Volume：3, Number：2, First page：155, Last page：164, 2012, [Reviewed]
  Scientific journal
• Theory and experiments of fast non-deterministic random bit generation using on-chip chaos lasers　　　　　　　　　　　　　　　
  Satoshi Sunada; Takahisa Harayama; Kenichi Arai; Jun Muramatsu; Kazuyuki Yoshimura; Ken Tsuzuki; Peter Davis; Atsushi Uchida
  IUTAM SYMPOSIUM ON 50 YEARS OF CHAOS: APPLIED AND THEORETICAL, Volume：5, First page：190, Last page：194, 2012, [Reviewed]
  We report physical random bit generation with on-chip chaos lasers. The design of the laser device is based on a theoretical model for non-deterministic random bit generation by amplification of microscopic noise. It is shown that the bit sequences generated at rates up to 2.08 gigabit per second (Gbit/s) pass a standard statistical test suite of randomness. (c) 2012 Published by Elsevier Ltd. Selection and/or Peer-review under responsibility of Takashi Hikihara and Tsutomu Kambe
  ELSEVIER SCIENCE BV, English, International conference proceedings
  DOI：https://doi.org/10.1016/j.piutam.2012.06.025
  DOI ID：10.1016/j.piutam.2012.06.025, ISSN：2210-9838, Web of Science ID：WOS:000314360900024
• Generalized synchronization and complexity in unidirectionally coupled dynamical systems　　　　　　　　　　　　　　　
  Kanno Kazutaka; Uchida Atsushi
  Nonlinear Theory and Its Applications, IEICE, Volume：3, Number：2, First page：143, Last page：154, 2012, [Reviewed]
  We investigate generalized synchronization and complexity in unidirectionally coupled Rössler systems and Mackey-Glass systems with time-delayed feedback. The generalized synchronization is measured by using two identical response systems which are driven by a common drive system. To measure the complexity, KS entropy and KY dimension are calculated quantitatively from the Lyapunov spectrum by using the linearized equations. The response systems show generalized synchronization for large coupling strengths. The entropy and dimensionality decrease as the coupling strength is increased. The minimum value of entropy is obtained at the condition of generalized synchronization, whose value corresponds to the entropy for the solitary drive system, even though the temporal waveforms of the drive and response systems are significantly different. The maximum entropy is achieved outside the region where generalized synchronization is achieved, whose value almost corresponds to the sum of those of the two solitary drive and response systems. It is found that the coupling effect changes the entropy within these two values. The dimensionality decreases monotonically even within the region of generalized synchronization.
  The Institute of Electronics, Information and Communication Engineers, English, Scientific journal
  DOI：https://doi.org/10.1587/nolta.3.143
  DOI ID：10.1587/nolta.3.143, ISSN：2185-4106, CiNii Articles ID：130002139286
• Estimation of entropy rate in a fast physical random-bit generator using a chaotic semiconductor laser with intrinsic noise　　　　　　　　　　　　　　　
  Takuya Mikami; Kazutaka Kanno; Kota Aoyama; Atsushi Uchida; Tohru Ikeguchi; Takahisa Harayama; Satoshi Sunada; Ken-ichi Arai; Kazuyuki Yoshimura; Peter Davis
  PHYSICAL REVIEW E, Volume：85, Number：1, First page：016211, Last page：1-7, Jan. 2012, [Reviewed]
  We analyze the time for growth of bit entropy when generating nondeterministic bits using a chaotic semiconductor laser model. The mechanism for generating nondeterministic bits is modeled as a 1-bit sampling of the intensity of light output. Microscopic noise results in an ensemble of trajectories whose bit entropy increases with time. The time for the growth of bit entropy, called the memory time, depends on both noise strength and laser dynamics. It is shown that the average memory time decreases logarithmically with increase in noise strength. It is argued that the ratio of change in average memory time with change in logarithm of noise strength can be used to estimate the intrinsic dynamical entropy rate for this method of random bit generation. It is also shown that in this model the entropy rate corresponds to the maximum Lyapunov exponent.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.85.016211
  DOI ID：10.1103/PhysRevE.85.016211, ISSN：1539-3755, Web of Science ID：WOS:000299957000004
• Synchronization of Semiconductor Lasers by Common Optical Injection with Constant-Amplitude and Random-Phase Modulation　　　　　　　　　　　　　　　
  YOSHIMURA Kazuyuki; UCHIDA Atsushi; DAVIS Peter; MURAMATSU Jun; HARAYAMA Takahisa; SUNADA Satoshi
  rle, Volume：39, Number：7, First page：520, Last page：524, Jul. 2011, [Reviewed]
  We numerically study the synchronization of two semiconductor lasers subject to injection of common
  The Laser Society of Japan, Japanese
  DOI ID：10.2184/lsj.39.520, ISSN：0387-0200, CiNii Articles ID：10029239156, CiNii Books ID：AN00255326
• Complexity Analysis in A Semiconductor Laser with Time-Delayed Optical Feedback　　　　　　　　　　　　　　　
  KANNO Kazutaka; UCHIDA Atsushi
  rle, Volume：39, Number：7, First page：543, Last page：549, Jul. 2011, [Reviewed]
  We investigate the complexity of chaotic temporal dynamics in a semiconductor laser with time-delayed
  The Laser Society of Japan, Japanese
  DOI ID：10.2184/lsj.39.543, ISSN：0387-0200, CiNii Articles ID：10029239232, CiNii Books ID：AN00255326
• Random optical pulse generation with bistable semiconductor ring lasers　　　　　　　　　　　　　　　
  Satoshi Sunada; Takahisa Harayama; Kenichi Arai; Kazuyuki Yoshimura; Ken Tsuzuki; Atsushi Uchida; Peter Davis
  OPTICS EXPRESS, Volume：19, Number：8, First page：7439, Last page：7450, Apr. 2011, [Reviewed]
  We experimentally show that a random optical pulse train can be generated by modulating a bistable semiconductor ring laser. When the ring laser is switched from the monostable to the bistable regime, it randomly selects one of two different stable unidirectional lasing modes, clockwise or counterclockwise modes. Non-deterministic random pulse sequences are generated by driving the switch parameter, the injection current, with a periodic pulse signal. The origin of the nondeterministic randomness is the amplified spontaneous emission noise coupled to the counter-propagating lasing modes. The statistical randomness properties are optimized by adjusting the relative strength of amplified spontaneous emission noise sources for the two lasing modes. It is also shown that it is possible to generate optical pulse sequences which pass a standard suite of statistical randomness tests. (C) 2011 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.19.007439
  DOI ID：10.1364/OE.19.007439, ISSN：1094-4087, Web of Science ID：WOS:000290482500041
• Chaos laser chips with delayed optical feedback using a passive ring waveguide　　　　　　　　　　　　　　　
  Satoshi Sunada; Takahisa Harayama; Kenichi Arai; Kazuyuki Yoshimura; Peter Davis; Ken Tsuzuki; Atsushi Uchida
  OPTICS EXPRESS, Volume：19, Number：7, First page：5713, Last page：5724, Mar. 2011, [Reviewed]
  We report a novel chaos semiconductor laser chip in which a distributed feedback (DFB) laser, two semiconductor optical amplifiers (SOAs) and a photodiode (PD) are monolithically integrated with a passive ring waveguide. The ring-type structure with the two separate SOAs achieves stronger delayed optical feedback compared to previous chaos laser chips which use linear waveguide and facet-reflection. The integrated PD allows efficient detection of the optical signal with low optical loss. A rich variety of dynamical behaviors and optical signals can be selectively generated via injection currents to the two separate SOAs. In particular, the strong optical feedback makes possible the generation of strong broadband optical chaos, with very flat spectrum of +/- 6.5 dB up to 10 GHz. The stability and quality of the chaotic mode is demonstrated using strict statistical tests of randomness applied to long binary sequences extracted by sampling the optical intensity signal. (c) 2011 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.19.005713
  DOI ID：10.1364/OE.19.005713, ISSN：1094-4087, Web of Science ID：WOS:000288852700001
• Fast nondeterministic random-bit generation using on-chip chaos lasers　　　　　　　　　　　　　　　
  Takahisa Harayama; Satoshi Sunada; Kazuyuki Yoshimura; Peter Davis; Ken Tsuzuki; Atsushi Uchida
  PHYSICAL REVIEW A, Volume：83, Number：3, First page：031803(R), Last page：1-4, Mar. 2011, [Reviewed]
  It is shown that broadband chaos suitable for fast nondeterministic random-bit generation in small devices can be achieved in a semiconductor laser with a short external cavity. The design of the device is based on a theoretical model for nondeterministic random-bit generation by amplification of microscopic noise. Moreover, it is demonstrated that bit sequences passing common tests of statistical randomness at rates up to 2.08 Gbits/s can be generated using on-chip lasers with a monolithically integrated external cavity, amplifiers, and a photodetector.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevA.83.031803
  DOI ID：10.1103/PhysRevA.83.031803, ISSN：1050-2947, Web of Science ID：WOS:000288385400001
• Reliability and synchronization in a delay-coupled neuronal network with synaptic plasticity　　　　　　　　　　　　　　　
  T. Perez and A. Uchida
  Physical Review E, Volume：83, First page：061915, Last page：1-6, 2011, [Reviewed]
• Generation of orthogonal codes with chaotic optical systems　　　　　　　　　　　　　　　
  D. Rontani, A. Locquet, M. Sciamanna, D. S. Citrin, and A. Uchida
  Optics Letters, Volume：36, Number：12, First page：2287, Last page：2289, 2011, [Reviewed]
• 光のランダム現象を応用した超高速物理乱数生成器の研究開発の最新動向　　　　　　　　　　　　　　　
  内田 淳史
  レーザー研究, Volume：39, Number：7, First page：508, Last page：514, 2011, [Reviewed]
• Complexity analysis in optically-coupled chaotic semiconductor lasers with consistency　　　　　　　　　　　　　　　
  Kazutaka Kanno; Atsushi Uchida
  Optics InfoBase Conference Papers, 2011
  The complexity of optically-coupled chaotic semiconductor lasers is quantitatively evaluated in terms of the entropy. It is found that the complexity is strongly dependent of the consistency of the two coupled lasers. FIO/ LS Technical Digest © 2011 OSA.
  Optical Society of America (OSA), English, International conference proceedings
  DOI：https://doi.org/10.1364/fio.2011.fthm3
  DOI ID：10.1364/fio.2011.fthm3, ISSN：2162-2701, SCOPUS ID：85088182187
• Fast physical random number generation with bandwidth enhancement of chaotic semiconductor lasers　　　　　　　　　　　　　　　
  Taiki Yamazaki; Yasuhiro Akizawa; Atsushi Uchida; Takahisa Harayama; Satoshi Sunada; Kazuyuki Yoshimura; Peter Davis
  Optics InfoBase Conference Papers, 2011
  We experimentally demonstrate random bit generation using multi-bit samples of bandwidth-enhanced chaos in semiconductor lasers. The bit generation rate of 75 Gigabit per second is achieved. FIO/ LS Technical Digest © 2011 OSA.
  International conference proceedings
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84893531812&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84893531812&origin=inward
  eISSN：2162-2701, SCOPUS ID：84893531812
• Numerical Analysis of Chaos Synchronization in Semiconductor Lasers Subject to a Common Drive Signal　　　　　　　　　　　　　　　
  Isao Oowada; Toru Yamamoto; Atsushi Uchida; Shigeru Yoshimori; Kazuyuki Yoshimura; Jun Muramatsu; Shin-itiro Goto; Peter Davis
  ELECTRONICS AND COMMUNICATIONS IN JAPAN, Volume：93, Number：5, First page：50, Last page：58, May 2010, [Reviewed]
  Chaos synchronization of two semiconductor lasers commonly driven by a chaotic semiconductor laser subject to optical feedback was observed. Strongly correlated chaos synchronization between the two response lasers was observed even when the correlation between the drive and response lasers was low. It is shown that the cross correlation between the two responses is larger than that between the drive and response lasers over a wide parameter region. (C) 2010 Wiley Periodicals, Inc. Electron Comm Jpn, 93(5): 50-58, 2010; Published online in Wiley Inter Science (www.interscience.wiley.com). DOI 10.1002/ecj.10200
  SCRIPTA TECHNICA-JOHN WILEY & SONS, English, Scientific journal
  DOI：https://doi.org/10.1002/ecj.10200
  DOI ID：10.1002/ecj.10200, ISSN：1942-9533, Web of Science ID：WOS:000277744000007
• Fast random bit generation with bandwidth-enhanced chaos in semiconductor lasers　　　　　　　　　　　　　　　
  Kunihito Hirano; Taiki Yamazaki; Shinichiro Morikatsu; Haruka Okumura; Hiroki Aida; Atsushi Uchida; Shigeru Yoshimori; Kazuyuki Yoshimura; Takahisa Harayama; Peter Davis
  OPTICS EXPRESS, Volume：18, Number：6, First page：5512, Last page：5524, Mar. 2010, [Reviewed]
  We experimentally demonstrate random bit generation using multi-bit samples of bandwidth-enhanced chaos in semiconductor lasers. Chaotic fluctuation of laser output is generated in a semiconductor laser with optical feedback and the chaotic output is injected into a second semiconductor laser to obtain a chaotic intensity signal with bandwidth enhanced up to 16 GHz. The chaotic signal is converted to an 8-bit digital signal by sampling with a digital oscilloscope at 12.5 Giga samples per second (GS/s). Random bits are generated by bitwise exclusive-OR operation on corresponding bits in samples of the chaotic signal and its time-delayed signal. Statistical tests verify the randomness of bit sequences obtained using 1 to 6 bits per sample, corresponding to fast random bit generation rates from 12.5 to 75 Gigabit per second (Gb/s) (= 6 bit x 12.5 GS/s). (C) 2010 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.18.005512
  DOI ID：10.1364/OE.18.005512, ISSN：1094-4087, Web of Science ID：WOS:000276002500019
• 光注入により帯域拡大された半導体レｰザにおけるカオス同期実験　　　　　　　　　　　　　　　
  奥村 悠, 会田 裕貴, 内田 淳史
  埼玉大学工学部紀要, Volume：43, First page：29, Last page：32, 2010
• Characteristics of Fast Physical Random Bit Generation Using Chaotic Semiconductor Lasers　　　　　　　　　　　　　　　
  Kunihito Hirano; Kazuya Amano; Atsushi Uchida; Sunao Naito; Masaki Inoue; Shigeru Yoshimori; Kazuyuki Yoshimura; Peter Davis
  IEEE JOURNAL OF QUANTUM ELECTRONICS, Volume：45, Number：11, First page：1367, Last page：1379, Nov. 2009, [Reviewed]
  We investigate the characteristics of fast random bit generation using chaotic semiconductor lasers. The optical amplitudes of two lasers with chaotic oscillations induced by optical feedback are each sampled at a fixed rate to extract binary bit sequences which are then combined by an exclusive-OR operation to obtain a single random bit sequence. Bit sequences generated at rate of 1 Giga bit per second are verified to pass statistical tests of randomness. We describe the dependence of randomness on laser parameters, in particular the injection current, the external cavity length and the feedback strength. The results provide clear empirical guidelines for tuning the chaotic laser parameters to achieve random bit sequences. This study shows that chaotic laser devices can be fast and reliable sources of physical entropy for computing and communication applications.
  IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, English, Scientific journal
  DOI：https://doi.org/10.1109/JQE.2009.2031310
  DOI ID：10.1109/JQE.2009.2031310, ISSN：0018-9197, eISSN：1558-1713, Web of Science ID：WOS:000271138800001
• Synchronization of bandwidth-enhanced chaos in semiconductor lasers with optical feedback and injection　　　　　　　　　　　　　　　
  Hiroyuki Someya; Isao Oowada; Haruka Okumura; Takahiko Kida; Atsushi Uchida
  OPTICS EXPRESS, Volume：17, Number：22, First page：19536, Last page：19543, Oct. 2009, [Reviewed]
  We experimentally investigate the generation and synchronization of bandwidth-enhanced chaos in a semiconductor laser (drive laser) that is subject to optical injection from another chaotic semiconductor laser (injection laser) with optical feedback. Effective bandwidth enhancement is achieved over 12 GHz, under the condition in which the optical wavelength of the drive laser is positively detuned with respect to that of the injection laser, outside the injection locking range. The bandwidth-enhanced chaotic signal of the drive laser is injected into a third semiconductor laser (response laser) for synchronization. Synchronization of chaos with a bandwidth greater than 12 GHz is observed between the drive and response lasers, under the condition in which the optical wavelength of the response laser is negatively detuned with respect to that of the drive laser, satisfying the injection locking condition. High-quality chaos synchronization is observed within the injection locking range between the drive and response lasers and under the condition of a low relaxation oscillation frequency of the response laser. (c) 2009 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.17.019536
  DOI ID：10.1364/OE.17.019536, ISSN：1094-4087, Web of Science ID：WOS:000271629200021
• Analysis of Attenuation of HTS Strip Line Using Time-Dependent-Ginzburg-Landau Equation　　　　　　　　　　　　　　　
  Takehito Shimizu; Atsushi Uchida; Shigeru Yoshimori
  IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, Volume：19, Number：3, First page：2886, Last page：2888, Jun. 2009, [Reviewed]
  Since the photon energy of the electromagnetic waves in the millimeter wave and the THz regions is not small enough compared with the superconducting energy gap of the HTS at 77 K, we analyzed the propagation properties of the HTS strip lines in the millimeter wave and the THz regions using the two dimensional time-dependent-Ginzburg-Landau equation. Since the crystal structure of the HTS was anisotropic, the attenuation of the HTS strip line made of c-axis oriented thin film was about 1000 dB/mu m at 50 K. On the other hand, the attenuation of the HTS strip line made of a-axis oriented thin film was only 10 dB/m at 50 K.
  IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, English, Scientific journal
  DOI：https://doi.org/10.1109/TASC.2009.2018079
  DOI ID：10.1109/TASC.2009.2018079, ISSN：1051-8223, Web of Science ID：WOS:000268282200084
• Synchronization by injection of common chaotic signal in semiconductor lasers with optical feedback　　　　　　　　　　　　　　　
  Isao Oowada; Hiroki Ariizumi; Mao Li; Shigeru Yoshimori; Atsushi Uchida; Kazuyuki Yoshimura; Peter Davis
  OPTICS EXPRESS, Volume：17, Number：12, First page：10025, Last page：10034, Jun. 2009, [Reviewed]
  We investigate the dynamics of two semiconductor lasers with separate optical feedback when they are driven by a common signal injected from a chaotic laser under the condition of non-identical drive and response. We experimentally and numerically show conditions under which the outputs of the two lasers can be highly correlated with each other even though the correlation with the drive signal is low. In particular, the effects of the phase of the feedback light on the correlation characteristics are described. The maximum correlation between the two response lasers is obtained when the phase of the feedback light is matched between the two response lasers, while the minimum correlation is observed when the difference in the optical phase is p. On the other hand, the correlation between the drive and response is not sensitive to the phase of the feedback light, unlike the previously studied case of identical drive and response. We numerically examine the difference between the maximum and minimum cross correlations over a wide range of parameters, and show that it is largest when there is a balance between the injection strength and the feedback strength. (C) 2009 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.17.010025
  DOI ID：10.1364/OE.17.010025, ISSN：1094-4087, Web of Science ID：WOS:000266906400055
• Differential-phase-shift quantum key distribution experiment using fast physical random bit generator with chaotic semiconductor lasers　　　　　　　　　　　　　　　
  Toshimori Honjo; Atsushi Uchida; Kazuya Amano; Kunihito Hirano; Hiroyuki Someya; Haruka Okumura; Kazuyuki Yoshimura; Peter Davis; Yasuhiro Tokura
  OPTICS EXPRESS, Volume：17, Number：11, First page：9053, Last page：9061, May 2009, [Reviewed]
  A high speed physical random bit generator is applied for the first time to a gigahertz clocked quantum key distribution system. Random phase-modulation in a differential-phase-shift quantum key distribution (DPS-QKD) system is performed using a 1-Gbps random bit signal which is generated by a physical random bit generator with chaotic semiconductor lasers. Stable operation is demonstrated for over one hour, and sifted keys are successfully generated at a rate of 9.0 kbps with a quantum bit error rate of 3.2% after 25-km fiber transmission. (C) 2009 Optical Society of America
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.17.009053
  DOI ID：10.1364/OE.17.009053, ISSN：1094-4087, Web of Science ID：WOS:000266382200038
• Synchronization of chaotic semiconductor lasers by optical injection with random phase modulation　　　　　　　　　　　　　　　
  Shin-itiro Goto; Peter Davis; Kazuyuki Yoshimura; Atsushi Uchida
  OPTICAL AND QUANTUM ELECTRONICS, Volume：41, Number：3, First page：137, Last page：149, Feb. 2009, [Reviewed]
  It is shown that identical synchronization of two chaotic semiconductor lasers can be achieved by injection of a common optical signal with randomly varying phase. An optical signal with randomly modulated phase is injected into two semiconductor lasers which have chaotic oscillations due to optical feedback. Strong correlation between complex intensity oscillations of the two lasers is observed even though the intensity of the common injection signal is constant. Characteristic properties of this type of synchronization are shown, in particular, the dependence of the synchronization threshold on the injection strength and the rate of phase modulation, and the dependence of the intensity correlation on the difference in phase of optical feedback.
  SPRINGER, English, Scientific journal
  DOI：https://doi.org/10.1007/s11082-009-9333-y
  DOI ID：10.1007/s11082-009-9333-y, ISSN：0306-8919, eISSN：1572-817X, Web of Science ID：WOS:000272318400001
• Synchronization of broadband chaos in semiconductor lasers with optical injection　　　　　　　　　　　　　　　
  H.Okumura, A.Uchida, H.Someya, I.Oowada, and T.Kida
  Proceedings of 2009 International Symposium on Nonlinear Theory and its Applications, Volume：1, 2009
  IEICE
• Characteristics of robust random bit generation using fast chaotic semiconductor lasers　　　　　　　　　　　　　　　
  K.Hirano, K.Amano, A.Uchida, M.Inoue, S.Naito, S.Yoshimori, K.Yoshimura, and P.Davis
  Proceedings of 2009 International Symposium on Nonlinear Theory and its Applications, Volume：1, 2009
  IEICE
• Amplification of noise in chaotic semiconductor lasers used for fast physical random bit generation　　　　　　　　　　　　　　　
  K.Aoyama, A.Uchida, K.Yoshimura, and P.Davis
  Proceedings of 2009 International Symposium on Nonlinear Theory and its Applications, Volume：1, 2009
  IEICE
• Fast physical random bit generator based on chaotic semiconductor lasers: Application to quantum cryptography　　　　　　　　　　　　　　　
  Atsushi Uchida; Toshimori Honjo; Kazuya Amano; Kunihito Hirano; Hiroyuki Someya; Haruka Okumura; Shigeru Yoshimori; Kazuyuki Yoshimura; Peter Davis; Yasuhiro Tokura
  CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference, 2009, [Reviewed]
  English, International conference proceedings
  DOI：https://doi.org/10.1109/CLEOE-EQEC.2009.5192510
  DOI ID：10.1109/CLEOE-EQEC.2009.5192510, SCOPUS ID：70449564544
• Experimental evaluation of fast random bit sequence generation using chaotic semiconductor lasers　　　　　　　　　　　　　　　
  Atsushi Uchida; Kunihito Hirano; Amano Kazuya; Masaki Inoue; Sunao Naito; Hiroyuki Someya; Isao Oowada; Shigeru Yoshimori; Kazuyuki Yoshimura; Peter Davis
  CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference, 2009, [Reviewed]
  English, International conference proceedings
  DOI：https://doi.org/10.1109/CLEOE-EQEC.2009.5191703
  DOI ID：10.1109/CLEOE-EQEC.2009.5191703, SCOPUS ID：70449570975
• Independent component analysis of mixed chaos in electronic circuits　　　　　　　　　　　　　　　
  M. Kuraya; A. Uchida; S. Sano; S. Yoshimori; K. Umeno
  ELECTRONICS LETTERS, Volume：44, Number：3, First page：248, Last page：249, Jan. 2008, [Reviewed]
  Blind source separation of chaos generated in Mackey-Glass electronic circuits is demonstrated by using independent component analysis (ICA). Chaotic signals are mixed together with randomly selected mixing ratio and ICA is applied to the mixed chaotic signals for signal separation. Separation ability of ICA for a large number of mixed chaotic signals is also investigated.
  INST ENGINEERING TECHNOLOGY-IET, English, Scientific journal
  DOI：https://doi.org/10.1049/el:20083098
  DOI ID：10.1049/el:20083098, ISSN：0013-5194, Web of Science ID：WOS:000252959700054
• Blind source separation of chaotic laser signals by independent component analysis　　　　　　　　　　　　　　　
  Masahiko Kuraya; Atsushi Uchida; Shigeru Yoshimori; Ken Umeno
  OPTICS EXPRESS, Volume：16, Number：2, First page：725, Last page：730, Jan. 2008
  We experimentally demonstrate blind source separation of chaos generated in Nd:YVO4 microchip solid-state lasers by using independent component analysis. Two chaotic source signals are linearly mixed with randomly selected mixing ratio and independent component analysis is applied for the mixed signals to extract the source signals. We investigate blind source separation of many chaotic laser signals and succeed 100-signal separation of chaotic temporal waveforms. Longer temporal waveforms are required with increase of the number of mixed signals. (C) 2008 Optical Society of America.
  OPTICAL SOC AMER, English, Scientific journal
  DOI：https://doi.org/10.1364/OE.16.000725
  DOI ID：10.1364/OE.16.000725, ISSN：1094-4087, Web of Science ID：WOS:000252479700025
• Fractal dimension of chaotic light scattering in regular polyhedral mirror ball structures　　　　　　　　　　　　　　　
  Kazuya Amano; Daisuke Narimatsu; Satoshi Sotome; Shinya Tashiro; Atsushi Uchida; Shigeru Yoshimori
  PHYSICAL REVIEW E, Volume：76, Number：4, Oct. 2007, [Reviewed]
  We experimentally observe fractal patterns of chaotic light scattering in regular polyhedral mirror ball structures that consist of spherical reflectors located at the vertices of polyhedra as optical scattering devices. We measure the fractal dimension of the basin boundaries of the light scattering patterns in the regular polyhedral mirror ball structures.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.76.046213
  DOI ID：10.1103/PhysRevE.76.046213, ISSN：1539-3755, Web of Science ID：WOS:000250622100043
• Common-chaotic-signal induced synchronization in semiconductor lasers　　　　　　　　　　　　　　　
  Toru Yamamoto; Isao Oowada; Hoipang Yip; Atsushi Uchida; Shigeru Yoshimori; Kazuyuki Yoshimura; Jun Muramatsu; Shin-itiro Goto; Peter Davis
  OPTICS EXPRESS, Volume：15, Number：7, First page：3974, Last page：3980, Apr. 2007, [Reviewed]
  We experimentally and numerically observe synchronization of two semiconductor lasers commonly driven by a chaotic semiconductor laser subject to optical feedback. Under condition that the relaxation oscillation frequency is matched between the two response lasers, but mismatched between the drive and the two response lasers, we show that it is possible to observe strongly correlated synchronization between the two response lasers even when the correlation between the drive and response lasers is low. We also show that the cross correlation between the two responses is larger than that between drive and responses over a wide parameter region. (c) 2007 Optical Society of America.
  OPTICAL SOC AMER, English, Scientific journal
  ISSN：1094-4087, Web of Science ID：WOS:000245406400036
• Consistency in Lasers　　　　　　　　　　　　　　　
  UCHIDA Atsushi; YOSHIMORI Shigeru; MCALLISTER Ryan; ROY Rajarshi
  rle, Volume：35, Number：1, First page：38, Last page：42, Jan. 2007
  We experimentally and numerically investigate consistency of response output in a Nd: YAG microchip laser driven repeatedly by chaos and colored noise with different bandwidths. An increase of consistency is observed as the amplitude, of the drive signal is increased for both chaos and colored noise drive signals. After reaching an optimal value the consistency begins to decrease due to the deterministic dynamics of the nonlinear response as shown by the change in sign of the conditional Lyapunov exponent.
  The Laser Society of Japan, Japanese
  DOI：https://doi.org/10.2184/lsj.35.1_38
  DOI ID：10.2184/lsj.35.1_38, ISSN：0387-0200, CiNii Articles ID：10018703493, CiNii Books ID：AN00255326
• Synchronization of chaos in mutually coupled VCSELs: Numerical study　　　　　　　　　　　　　　　
  Krassimir Panajotov; Atsushi Uchida; Marc Sciamanna
  Conference on Lasers and Electro-Optics Europe - Technical Digest, 2007, [Reviewed]
  English, International conference proceedings
  DOI：https://doi.org/10.1109/CLEOE-IQEC.2007.4387005
  DOI ID：10.1109/CLEOE-IQEC.2007.4387005, SCOPUS ID：51249086515
• Dual synchronization of chaos in Mackey-Glass electronic circuits with time-delayed feedback　　　　　　　　　　　　　　　
  Satoshi Sano; Atsushi Uchida; Shigeru Yoshimori; Rajarshi Roy
  PHYSICAL REVIEW E, Volume：75, Number：1, Jan. 2007, [Reviewed]
  We experimentally and numerically demonstrate the dual synchronization of chaos in two pairs of one-way-coupled Mackey-Glass electronic circuits with time-delayed feedback. The outputs of the two drive circuits are mixed and used both for the feedback signal to the two drive circuits and for the transmission signal to the two response circuits. We investigate the regions for achieving dual synchronization of chaos when the delay time is mismatched between the drive and response circuits.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.75.016207
  DOI ID：10.1103/PhysRevE.75.016207, ISSN：1539-3755, Web of Science ID：WOS:000243893700025
• Chaotic dynamics and synchronization in microchip solid-state lasers with optoelectronic feedback　　　　　　　　　　　　　　　
  Atsushi Uchida; Keisuke Mizumura; Shigeru Yoshimori
  PHYSICAL REVIEW E, Volume：74, Number：6, Dec. 2006, [Reviewed]
  We experimentally observe the dynamics of a two-mode Nd:YVO4 microchip solid-state laser with optoelectronic feedback. The total laser output is detected and fed back to the injection current of the laser diode for pumping. Chaotic oscillations are observed in the microchip laser with optoelectronic self-feedback. We also observe the dynamics of two microchip lasers coupled mutually with optoelectronic link. The output of one laser is detected by a photodiode and the electronic signal converted from the laser output is sent to the pumping of the other laser. Chaotic fluctuation of the laser output is observed when the relaxation oscillation frequency is close to each other between the two microchip lasers. Synchronization of periodic wave form is also obtained when the microchip lasers have a single-longitudinal mode.
  AMERICAN PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.74.066206
  DOI ID：10.1103/PhysRevE.74.066206, ISSN：1539-3755, Web of Science ID：WOS:000243165900029
• Chaotic oscillations in Josephson tetrode　　　　　　　　　　　　　　　
  A Uchida; H Iida; N Maki; M Osawa; S Yoshimori
  IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, Volume：14, Number：4, First page：2064, Last page：2070, Dec. 2004
  We numerically demonstrate the generation of chaos in a four-terminal superconductive device made of five Josephson weak-link junctions, which is referred to as "Josephson tetrode," for the applications of ultrafast random signal generations at frequencies of hundreds of gigahertz. In the Josephson tetrode, two junctions are series-connected and three junctions are parallel-connected. We calculate the dynamics of electrical voltages across the junctions when one of the normal resistances is varied. We confirm the generation of chaos by using a bifurcation diagram, three-dimensional attractors, and the Poincare sections. The bifurcation diagram can be interpreted as the quasi-periodicity-breakdown scenario to chaos. We clarify that the mechanism of the generation of chaos is a nonlinear frequency mixing among three independent voltages across the junctions. The condition of the generation of chaos can be predicted from the values of the coefficients in the equations of our model.
  IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, English, Scientific journal
  DOI：https://doi.org/10.1109/TASC.2004.838314
  DOI ID：10.1109/TASC.2004.838314, ISSN：1051-8223, Web of Science ID：WOS:000225707500006
• Transient characteristics of chaos synchronization in a semiconductor laser subject to optical feedback　　　　　　　　　　　　　　　
  A Uchida; N Shibasaki; S Nogawa; S Yoshimori
  PHYSICAL REVIEW E, Volume：69, Number：5, May 2004
  We have investigated the transient characteristics of two types of chaos synchronization in a semiconductor laser subject to optical feedback: complete synchronization and strong injection locking-type synchronization. We have calculated the statistical distribution of the transient response time of synchronization when the initial position in the starting attractor is varied. For complete synchronization, the distribution of the transient response time has much larger average and variance than the average period of the chaotic oscillations. Conversely, a short transient response time is obtained for strong injection locking-type synchronization. We found that the transient response time is dependent upon the maximum Lyapunov exponent of the chaotic temporal waveform for complete synchronization, whereas it is almost constant for strong injection locking-type synchronization.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.69.056201
  DOI ID：10.1103/PhysRevE.69.056201, ISSN：1539-3755, Web of Science ID：WOS:000221813400030
• Generalized synchronization of chaos in He-Ne lasers　　　　　　　　　　　　　　　
  A Uchida; K Higa; T Shiba; S Yoshimori; F Kuwashima; H Iwasawa
  PHYSICAL REVIEW E, Volume：68, Number：1, Jul. 2003
  We experimentally demonstrate synchronization of chaos in one-way coupled He-Ne lasers with optical feedback. We observe different types of synchronization such as identical synchronization, inverse synchronization, and random amplification. These dynamics are maintained only for a short duration of several hundred milliseconds. We also observe generalized synchronization of chaos by using one master and two slave lasers. The generalized synchronization is achieved for a long duration of tens of seconds under injection locking. The generalized synchronization is always maintained while the injection locking is achieved.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.68.016215
  DOI ID：10.1103/PhysRevE.68.016215, ISSN：1539-3755, Web of Science ID：WOS:000184582500050
• Transient characteristics between periodic attractors stabilized by chaos control in a semiconductor laser　　　　　　　　　　　　　　　
  A. Uchida; T. Sato; S. Yoshimori; F. Kannari
  International Journal of Bifurcation and Chaos in Applied Sciences and Engineering, Volume：13, Number：5, First page：1309, Last page：1317, 2003, [Reviewed]
  We investigate the transient response time between periodic attractors stabilized by chaos control methods in a semiconductor laser. We use the revised occasional proportional feedback (ROPF) method to shorten the transient response time and compare it with the high frequency injection (HFI) method. A chaotic attractor is stabilized resulting in two different periodic attractors (period-1 and period-6) under different control parameters, and the transient response time is measured as one of the stabilized periodic attractors is switched to the other. During the transition, the trajectory approaches a certain unstable periodic orbit (UPO), and the distance between the trajectory in the phase space and the UPO can be described as an exponential function of the transient response time. Since the trajectory can directly converge into the periodic orbit by using the ROPF method, the transient response time obtained by the ROPF method can be shortened more than that obtained by the HFI method.
  World Scientific Publishing Co. Pte Ltd, English, Scientific journal
  DOI：https://doi.org/10.1142/S0218127403007254
  DOI ID：10.1142/S0218127403007254, ISSN：0218-1274, SCOPUS ID：0043199876
• Numerical study for secure communications using the chaotic masking method in two microchip lasers　　　　　　　　　　　　　　　
  Takeshi Ogawa; Atsushi Uchida; Masahiko Shinozuka; Shigeru Yoshimori; Fumihiko Kannari
  Japanese Journal of Applied Physics, Part 2: Letters, Volume：41, Number：11 B, First page：L1309, Last page：L1311, Nov. 2002
  Japan Society of Applied Physics, English, Scientific journal
  DOI：https://doi.org/10.1143/jjap.41.l1309
  DOI ID：10.1143/jjap.41.l1309, ISSN：0021-4922, SCOPUS ID：0037113682
• Synchronization of chaos in microchip lasers by using incoherent feedback　　　　　　　　　　　　　　　
  A Uchida; T Matsuura; S Kinugawa; S Yoshimori
  PHYSICAL REVIEW E, Volume：65, Number：6, Jun. 2002
  We propose a chaos-synchronization scheme using incoherent feedback to the pumping power in two microchip lasers. The population inversion of the slave laser is controlled for synchronization by using the detected signals of the peak heights of chaotic pulse intensities in the two lasers. Matching of the optical frequencies between the two lasers (i.e., injection locking) is not required for synchronization using this method. We numerically demonstrate the incoherent feedback method and investigate synchronization regions against parameter mismatching between the two lasers. Synchronization is maintained within a mismatching of 1% for all laser parameters, which implies that the difficulty in reproducing the synchronized laser pulses is very useful for applications of secure optical communications.
  AMER PHYSICAL SOC, English, Scientific journal
  DOI：https://doi.org/10.1103/PhysRevE.65.066212
  DOI ID：10.1103/PhysRevE.65.066212, ISSN：1539-3755, Web of Science ID：WOS:000176762900051
• Chaotic oscillations in microchip lasers with frequency-modulated feedback light　　　　　　　　　　　　　　　
  Atsushi Uchida; Shigeru Yoshimori
  IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Volume：E85-A, Number：9, First page：2009, Last page：2014, 2002
  We have experimentally observed the dynamics of laser outputs in a microchip laser with frequency-modulated feedback light. We have observed rich dynamics that can be interpreted as three types of dynamics at different frequencies: (1) periodic bursts at twice of the frequency of the modulation of the external mirror, (2) chaotic pulsations at the relaxation oscillation frequency, and (3) clusters at the instantaneous Doppler-shifted frequency. We have confirmed these rich dynamics by using numerical simulations.
  Institute of Electronics, Information and Communication, Engineers, IEICE, English, International conference proceedings
  ISSN：0916-8508, SCOPUS ID：0036739493
• Chaotic on-off keying for secure communications　　　　　　　　　　　　　　　
  A. Uchida; S. Yoshimori; M. Shinozuka; T. Ogawa; F. Kannari
  Optics Letters, Volume：26, Number：12, First page：866, Last page：868, Jun. 2001, [Reviewed]
  We experimentally demonstrate a chaotic on-off keying method for secure communications by using chaos synchronization in two microchip lasers. The output of the microchip laser in the transmitter is externally modulated with an acousto-optic modulator at ∼4 MHz. One encodes a digital message in the chaotic carrier by turning the modulation on and off at 100 kHz. Because the accuracy of synchronization for the slave laser in the receiver tends to be degraded in the presence of external modulation in the injection laser signal, one can distinguish two binary states. The digital message can be recovered as an envelope of the chaotic oscillation when the difference between the two laser outputs of the transmitter and the receiver is calculated. © 2001 Optical Society of America.
  Optical Society of America (OSA), English, Scientific journal
  DOI：https://doi.org/10.1364/OL.26.000866
  DOI ID：10.1364/OL.26.000866, ISSN：0146-9592, SCOPUS ID：0000327034

• 内田 淳史, "リザーバコンピューティング," 2023年度 光技術動向調査報告書, 3.3.1節 (2024).　　　　　　　　　　　　　　　
  2024
  光技術動向調査報告書の執筆
• 内田 淳史, "リザーバコンピューティング," 2021年度 光技術動向調査報告書, 3.3.1節 (2022).　　　　　　　　　　　　　　　
  2022
  光技術動向調査報告書の執筆
• 内田 淳史, "リザーバコンピューティング," 2020年度 光技術動向調査報告書, 3.3.1節 (2021).　　　　　　　　　　　　　　　
  2021
  光技術動向調査報告書の執筆
• Adaptivity and convergence characteristics of decision making using chaotic semiconductor laser　　　　　　　　　　　　　　　
  巳鼻 孝朋; 寺島 悠太; 成瀬 誠; 金 成主; 内田 淳史
  Volume：117, Number：121, First page：41, Last page：46, 13 Jul. 2017
  Japanese
  ISSN：0913-5685, CiNii Articles ID：40021284594, CiNii Books ID：AN10060800
• Performance Improvement of Optical Reservoir Computing Based on Complex Transient Dynamics of a Laser with Time-Delayed Feedback　　　　　　　　　　　　　　　
  菅野 円隆, 手塚 美和, 中山 丞真, 内田 淳史, 文仙 正俊
  レーザー研究, Volume：45, Number：3, First page：148, Last page：152, Mar. 2017
  Japanese
  ISSN：0387-0200, CiNii Articles ID：40021146489, CiNii Books ID：AN00255326
• ナノ光学とレーザーカオスを用いた超高集積・超高速意思決定 (特集 生命知能から紡ぐ次世代コンピューティング : 分子エレ・バイオエレへの展開は可能か?)　　　　　　　　　　　　　　　
  成瀬 誠; 内田 淳史; 金 成主
  Volume：28, Number：1, First page：13, Last page：16, Feb. 2017
  Japanese
  ISSN：2423-8805, CiNii Articles ID：40021093990, CiNii Books ID：AN10464559
• N-1-20 Intermittent route to chaos in a photonic integrated circuit　　　　　　　　　　　　　　　
  Karsaklian Dal Bosco Andreas; Akizawa Yasuhiro; Kanno Kazutaka; Uchida Atsushi; Harayama Takahisa; Yoshimura Kazuyuki
  Proceedings of the IEICE Engineering Sciences Society/NOLTA Society Conference, Volume：2016, First page：358, Last page：358, 01 Mar. 2016
  The Institute of Electronics, Information and Communication Engineers, English
  ISSN：2189-700X, CiNii Articles ID：110010023397, CiNii Books ID：AA12732012
• N-1-22 Reservoir computing with semiconductor lasers using a colored-noise mask signal　　　　　　　　　　　　　　　
  Nakayama Joma; Kanno Kazutaka; Uchida Atsushi
  Proceedings of the IEICE Engineering Sciences Society/NOLTA Society Conference, Volume：2016, First page：360, Last page：360, 01 Mar. 2016
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：2189-700X, CiNii Articles ID：110010023399, CiNii Books ID：AA12732012
• A-24-3 Experiment on common-signal-induced synchronization using a broadband noise signal and photonic integrated circuits　　　　　　　　　　　　　　　
  Sasaki Takuma; Kakesu Izumi; Uchida Atsushi; Sunada Satoshi; Yoshimura Kazuyuki; Arai Kenichi
  Proceedings of the IEICE Engineering Sciences Society/NOLTA Society Conference, Volume：2015, First page：178, Last page：178, 25 Aug. 2015
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：2189-700X, CiNii Articles ID：110009996161, CiNii Books ID：AA12732012
• Estimation of the Lyapunov Exponent Using Transient of Generalized Synchronization in Semiconductor Lasers with Optical Feedback　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史, 文仙 正俊
  レーザー研究, Volume：43, Number：6, First page：387, Last page：392, Jun. 2015
  Japanese
  ISSN：0387-0200, CiNii Articles ID：40020513243, CiNii Books ID：AN00255326
• A-2-17 Self-pulsations and dynamics in photonic integrated circuit　　　　　　　　　　　　　　　
  Andreas Karsaklian Dal Bosco; Ugajin Kazusa; Kanno Kazutaka; Harayama Takahisa; Yoshimura Kazuyuki; Uchida Atsushi
  Proceedings of the IEICE General Conference, Volume：2015, First page：48, Last page：48, 24 Feb. 2015
  The Institute of Electronics, Information and Communication Engineers, English
  CiNii Articles ID：110009944231, CiNii Books ID：AN10471452
• A-2-15 Frequency dependence on chaos synchronization in photonic integrated circuit with mutually-coupled semiconductor lasers　　　　　　　　　　　　　　　
  Ohara Shoma; Ugajin Kazusa; Takahashi Rie; Harayama Takahisa; Yoshimura Kazuyuki; Uchida Atsushi
  Proceedings of the IEICE General Conference, Volume：2015, First page：46, Last page：46, 24 Feb. 2015
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110009944229, CiNii Books ID：AN10471452
• A-2-16 Reservoir computing based on consistency of semiconductor lasers by using chaotic mask　　　　　　　　　　　　　　　
  Nakayama Joma; Kanno Kazutaka; Uchida Atsushi
  Proceedings of the IEICE General Conference, Volume：2015, First page：47, Last page：47, 24 Feb. 2015
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110009944230, CiNii Books ID：AN10471452
• A-2-14 Lyapunov spectrum analysis in a semiconductor laser with double optical feedback　　　　　　　　　　　　　　　
  Tezuka Miwa; Kanno Kazutaka; Uchida Atsushi; Bunsen Masatoshi
  Proceedings of the IEICE General Conference, Volume：2015, First page：45, Last page：45, 24 Feb. 2015
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110009944228, CiNii Books ID：AN10471452
• Fast Physical Random Number Generation and Secure Key Distribution with Random Phenomenon in Semiconductor Lasers　　　　　　　　　　　　　　　
  内田 淳史, 吉村 和之, 村松 純, デイビス ピーター, 原山 卓久, 砂田 哲
  光学, Volume：43, Number：5, First page：194, Last page：201, May 2014
  Japanese
  ISSN：0389-6625, CiNii Articles ID：40020099842, CiNii Books ID：AN00080324
• A-2-11 Experiment on common-signal-induced synchronization of semiconductor lasers with broadband noise light　　　　　　　　　　　　　　　
  Hida Takuya; Suzuki Nobumitsu; Kanno Kazutaka; Uchida Atsushi; Yoshimura Kazuyuki; Arai Kenichi
  Proceedings of the IEICE General Conference, Volume：2014, First page：36, Last page：36, 04 Mar. 2014
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110009831060, CiNii Books ID：AN10471452
• Steady state analysis on Leader-Laggard relationship in chaotic synchronized semiconductor lasers with low-frequency fluctuations　　　　　　　　　　　　　　　
  KANNO Kazutaka; HIDA Takuya; UCHIDA Atsushi
  IEICE technical report. Nonlinear problems, Volume：113, Number：383, First page：93, Last page：98, 21 Jan. 2014
  We investigate transient dynamics of synchronized low frequency fluctuations (LFFs) in mutually coupled semiconductor lasers. We observe repeated spontaneous switching of leader-laggard relationship in two lasers. We found that the relationship between the optical frequencies of the two lasers decides the leader laser with sudden intensity dropouts of LFFs. We explain this phenomenon by using an analysis of steady state solutions in the Lang-Kobayashi equations that describe the dynamics of semiconductor lasers. We found that the optical frequency of the leader laser attracts the optical frequency of the laggard laser while the trajectories of the two lasers wander many steady state solutions, and spontaneouts switching of leader-laggard relationship occurs. We also found that sudden intensity dropouts occur at the maximum gain mode obtained from the analysis of steady state solutions in a solitary laser with optical feedback.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110009825483, CiNii Books ID：AN10060800
• Experiment on bandwidth enhancement of chaos in three cascaded semiconductor lasers　　　　　　　　　　　　　　　
  Sakuraba Ryohsuke; Kanno Kazutaka; Iwakawa Kento; Uchida Atsushi
  Proceedings of the Society Conference of IEICE, Volume：2013, First page：39, Last page：39, 03 Sep. 2013
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110009737159, CiNii Books ID：AN10489017
• Experiment on physical random number generation using photonic integrated circuit with mutually coupled semiconductor lasers　　　　　　　　　　　　　　　
  Takahashi Rie; Akizawa Yasuhiro; Uchida Atsushi; Harayama Takahisa; Tsuzuki Ken; Sunada Satoshi; Yoshimura Kazuyuki; Arai Kenichi; Peter Davis
  Proceedings of the Society Conference of IEICE, Volume：2013, First page：34, Last page：34, 03 Sep. 2013
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110009737154, CiNii Books ID：AN10489017
• Statistical evaluation of correlation of physical random numbers generated from chaotic semiconductor lasers　　　　　　　　　　　　　　　
  Iwakawa Kento; Kanno Kazutaka; Sakuraba Ryohsuke; Akizawa Yasuhiro; Uchida Atsushi
  Proceedings of the Society Conference of IEICE, Volume：2013, First page：38, Last page：38, 03 Sep. 2013
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110009737158, CiNii Books ID：AN10489017
• Experiment on secure key distribution using common-signal-induced synchronization in cascaded semiconductor lasers　　　　　　　　　　　　　　　
  Kakesu Izumi; Koizumi Hayato; Morikatu Shinichiro; Aida Hiroki; Nozawa Takahiro; Uchida Atsushi; Yoshimura Kazuyuki; Muramatsu Jun; Davis Peter
  Proceedings of the Society Conference of IEICE, Volume：2013, First page：35, Last page：35, 03 Sep. 2013
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110009737155, CiNii Books ID：AN10489017
• Spontaneous switching of Leader-Laggard relationship for lag chaos synchronization in mutually-coupled semiconductor lasers　　　　　　　　　　　　　　　
  HIDA Takuya; KANNO Kazutaka; UCHIDA Atsushi
  IEICE technical report. Nonlinear problems, Volume：113, Number：116, First page：99, Last page：104, 08 Jul. 2013
  We investigate instantaneous behaviors of the leader-laggard relationship of temporal waveforms in mutually-coupled two semiconductor lasers in the open-loop configuration. The temporal waveform of one laser output is delayed with respect to that of the other laser output by the propagation delay time, and the leader-laggard relationship can be determined by measuring cross correlation between the two temporal waveforms with time delay. The leader can be identified on average when the optical carrier frequency of the leader laser is higher than the other laser. However, when short-term cross-correlation is measured and the local structure of the leader-laggard relationship is investigated, spontaneous exchange between the leader and laggard lasers can be observed in time, even for fixed initial optical frequency detuning. These numerical results agree with our experimental observation.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110009773275, CiNii Books ID：AN10060800
• Fast physical random bit generation using photonic integrated circuits with external cavities for chaos generation　　　　　　　　　　　　　　　
  Takahashi Rie; Akizawa Yasuhiro; Yamazaki Taiki; Uchida Atsushi; Harayama Takahisa; Tsuzuki Ken; Sunada Satoshi; Yoshimura Kazuyuki; Arai Kenichi; Davis Peter
  IEICE technical report. Nonlinear problems, Volume：113, Number：116, First page：93, Last page：98, 08 Jul. 2013
  Recently, fast physical random-number generators using chaotic lasers have been proposed. However, most previous schemes using chaotic lasers schemes are bulky to implement. Random number generation using a photonic integrated circuit (PIC) with 10-mm-long external cavity for fast chaos generation has been demonstrated. In this study, we investigated the condition for generating fast random numbers for different sampling rates using a PIC with 5-mm-long external cavity. We also used PICs with different external cavity lengths and generated random bit sequences at various sampling rates. We can generate random bits at rates up to 5.56 Gb/s using a PIC with 4-mm-long external cavity.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110009773274, CiNii Books ID：AN10060800
• Estimation of maximum Lyapunov exponent based on generalized synchronization in semiconductor lasers with optical feedback　　　　　　　　　　　　　　　
  KANNO Kazutaka; UCHIDA Atsushi
  IEICE technical report. Nonlinear problems, Volume：113, Number：116, First page：105, Last page：110, 08 Jul. 2013
  Semiconductor lasers with time-delayed optical feedback have infinite dimensionality in general. The methods for estimating Lyapunov exponents have not been established yet. In this study, we propose a method for calculating the maximum Lyapunov exponent in semiconductor lasers with time-delayed optical feedback by using generalized synchronization. The maximum Lyapunov exponent is numerically estimated and compared with the exponent calculated from the linearized Lang-Kobayashi equation. The maximum Lyapunov exponents calculated by using the two methods are almost identical. This method can be applied for the estimation of the maximum Lyapunov exponent in experimental systems.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110009773276, CiNii Books ID：AN10060800
• A-2-7 Influence of parameter mismatch on encoding and decoding using consistency in semiconductor lasers　　　　　　　　　　　　　　　
  Takahashi Junichi; Kanno Kazutaka; Uchida Atsushi
  Proceedings of the IEICE General Conference, Volume：2013, First page：34, Last page：34, 05 Mar. 2013
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110009699123, CiNii Books ID：AN10471452
• Complexity and frequency bandwidth in optically coupled semiconductor laser　　　　　　　　　　　　　　　
  KANNO K.; UCHIDA A.
  Volume：442, First page：25, Last page：30, 28 Feb. 2013
  Japanese
  CiNii Articles ID：10031154838, CiNii Books ID：AA11604414
• Calculating finite-time Lyapunov exponents in time delayed dynamical systems　　　　　　　　　　　　　　　
  KANNO Kazutaka; UCHIDA Atsushi
  IEICE technical report. Nonlinear problems, Volume：112, Number：389, First page：73, Last page：78, 24 Jan. 2013
  Lyapunov exponents represents a exponential expansion (construction) rate of a infinitesimal perturba-tion to an orbit of a dynamical system, which are asymptotic values over an attractor of the system. Finite-time Lyapunov exponents have been proposed to quantify the exponential expansion (construction) rate for finite orbits. We can obtain some information which is useful for classification of chaos dynamics, chaos control, and prediction. However, a method for calculation of the finite-time Lyapunov exponents in time-delayed dynamical systems have not been well established yet because of the difficulty of calculating Lyapunov exponents in time-delayed high-dimen-sional systems. We present a method for calculating the finite-time Lyapunov exponents in time-delayed dynamical systems, and apply it to a Mackey-Glass model, an optpelectromc feedback laser system and a Lang-Kobayashi equation for a semiconductor laser with optical feedback. We investigate standard deviation of the finite-time Lya-punov exponents for the variation of a delay time and a length of a orbit. It is found that the standard deviation approaches to zero as finite time L, and this approach is as L-v.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110009727580, CiNii Books ID：AN10060800
• A-2-20 Real-time physical random number generation using a Mackey-Glass electronic circuit for chaos generation　　　　　　　　　　　　　　　
  Sakuraba Ryohsuke; Yamazaki Taiki; Uchida Atsushi
  Proceedings of the Society Conference of IEICE, Volume：2012, First page：43, Last page：43, 28 Aug. 2012
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110009591282, CiNii Books ID：AN10489017
• A-2-3 Analysis of finite-time Lyapunov exponents in time-delayed dynamical systems　　　　　　　　　　　　　　　
  Kanno Kazutaka; Uchida Atsushi
  Proceedings of the Society Conference of IEICE, Volume：2012, First page：26, Last page：26, 28 Aug. 2012
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110009591265, CiNii Books ID：AN10489017
• A-2-4 Experiment on secure key distribution using common-signal-induced synchronization in semiconductor lasers　　　　　　　　　　　　　　　
  Koizumi Hayato; Morikatsu Shinichiro; Aida Hiroki; Arahata Masaya; Nozawa Takahiro; Uchida Atsushi; Yoshimura Kazuyuki; Muramatsu Jun
  Proceedings of the Society Conference of IEICE, Volume：2012, First page：27, Last page：27, 28 Aug. 2012
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110009591266, CiNii Books ID：AN10489017
• Physical Random Number Generation Technology Supporting Security Network [III] : Review on Fast Physical Random Number Generators with Chaotic Lasers　　　　　　　　　　　　　　　
  UCHIDA Atsushi
  The Journal of the Institute of Electronics, Information, and Communication Engineers, Volume：95, Number：1, First page：74, Last page：80, 01 Jan. 2012
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5693, CiNii Articles ID：110008898153, CiNii Books ID：AN1001339X
• Evaluation of local Lyapunov exponents in a semiconductor laser with time-delayed optical feedback　　　　　　　　　　　　　　　
  KANNO Kazutaka; UCHIDA Atsushi
  IEICE technical report. Nonlinear problems, Volume：111, Number：276, First page：97, Last page：102, 02 Nov. 2011
  Local Lyapunov exponents can be used to evaluate local stability of dynamical systems in phase space. In time-delayed dynamical systems, the techniques for calculating local Lyapunov exponents have not been well established, even though some examples of the calculation of the averaged Lyapunov exponent have been reported. We propose a method to calculate local Lyapunov exponents in time-delayed dynamical systems and evaluate the validity of the method by using a model of a semiconductor laser with time-delayed optical feedback.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110009465766, CiNii Books ID：AN10060800
• Secure key distribution using correlated randomness in optical devices　　　　　　　　　　　　　　　
  YOSHIMURA Kazuyuki; MURAMATSU Jun; DAVIS Peter; UCHIDA Atsushi; HARAYAMA Takahisa
  IEICE technical report. Nonlinear problems, Volume：111, Number：276, First page：81, Last page：84, 02 Nov. 2011
  We propose a secure key distribution scheme based on correlated physical randomness in remote optical scramblers driven by common broadband random light. Moreover, we propose a particular realization of the scheme using synchronization of semiconductor lasers injected with common broadband random light.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110009465763, CiNii Books ID：AN10060800
• Experiment on secure key distribution using correlated random phenomenon in semiconductor lasers　　　　　　　　　　　　　　　
  KOIZUMI Hayato; MORIKATSU Shinichiro; AIDA Hiroki; ARAHATA Masaya; UCHIDA Atsushi; YOSHIMURA Kazuyuki; MURAMATSU Jun; DAVIS Peter
  IEICE technical report. Nonlinear problems, Volume：111, Number：276, First page：85, Last page：90, 02 Nov. 2011
  Recently it has been proposed that optical devices can be used to generate correlated random bit sequences and that secure key distribution is possible using the correlated random bit sequences. We report the first experimental demonstration of a scheme for generating correlated random bit sequences, using semiconductor lasers synchronized by common random optical signals. The correlated random bit sequences generated in this scheme can be used by two legitimate users to create information-theoretically secure keys.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110009465764, CiNii Books ID：AN10060800
• A-2-34 Experiment on common-noise-induced synchronization in semiconductor lasers with constant-amplitude random-phase drive signal　　　　　　　　　　　　　　　
  Aida Hiroki; Okumura Haruka; Arahata Masaya; Koizumi Hayato; Uchida Atsushi; Yoshimura Kazuyuki; Davis Peter
  Proceedings of the Society Conference of IEICE, Volume：2011, First page：71, Last page：71, 30 Aug. 2011
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110008734684, CiNii Books ID：AN10489017
• A-2-32 Post-processing for fast physical random number generation with chaotic semiconductor lasers　　　　　　　　　　　　　　　
  Akizawa Yasuhiro; Yamazaki Taiki; Uchida Atsushi; Harayama Takahisa; Sunada Satoshi; Arai Ken-ichi; Yoshimura Kazuyuki; Davis Peter
  Proceedings of the Society Conference of IEICE, Volume：2011, First page：69, Last page：69, 30 Aug. 2011
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110008734682, CiNii Books ID：AN10489017
• A-2-29 Synchronization in semiconductor lasers subject to common drive signal　　　　　　　　　　　　　　　
  Okumura Haruka; Aida Hiroki; Someya Hiroyuki; Uchida Atsushi; Yoshimura Kazuyuki; Davis Peter
  Proceedings of the IEICE General Conference, Volume：2011, First page：70, Last page：70, 28 Feb. 2011
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110008512978, CiNii Books ID：AN10471452
• A-2-24 Theoretical study on fast non-deterministic physical random bit generation with laser chaos　　　　　　　　　　　　　　　
  Sunada Satoshi; Harayama Takashisa; Arai Kenichi; Yoshimura Kazuyuki; Davis Peter; Uchida Atsushi
  Proceedings of the IEICE General Conference, Volume：2011, First page：65, Last page：65, 28 Feb. 2011
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110008512973, CiNii Books ID：AN10471452
• A-2-25 Entropy generation rate of physical random bit generator with chaotic semiconductor lasers with noise　　　　　　　　　　　　　　　
  Mikami Takuya; Kanno Kazutaka; Aoyama Kota; Uchida Atsushi; Harayama Takahisa; Sunada Satoshi; Arai Kenichi; Yoshimura Kazuyuki; Davis Peter
  Proceedings of the IEICE General Conference, Volume：2011, First page：66, Last page：66, 28 Feb. 2011
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110008512974, CiNii Books ID：AN10471452
• A-2-30 Consistency and entropy in optically coupled semiconductor lasers subjected to delayed optical feedback　　　　　　　　　　　　　　　
  Kanno Kazutaka; Uchida Atsushi
  Proceedings of the IEICE General Conference, Volume：2011, First page：71, Last page：71, 28 Feb. 2011
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110008512979, CiNii Books ID：AN10471452
• Consistency and Lyapunov spectrum analysis in optically coupled semiconductor lasers　　　　　　　　　　　　　　　
  KANNO Kazutaka; UCHIDA Atsushi
  IEICE technical report, Volume：110, Number：388, First page：173, Last page：178, 17 Jan. 2011
  Consistency of response in a system driven repeatedly by a complex signal has been observed in many nonlinear dynamical systems. Consistency could be applied for physical one-way function for information security. We investigate the consistency of coupled semiconductor lasers with optical feedback and measure the complexity of the coupled laser system by using Lyapunov spectrum. The complexity of coupled lasers increases with the increase of a coupling strength, however, the complexity decreases suddenly when consistency is achieved under strong coupling strength.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110008676754, CiNii Books ID：AN10091178
• Synchronization in semiconductor lasers subject to common drive signal with constant-amplitude random-phase　　　　　　　　　　　　　　　
  OKUMURA Haruka; AIDA Hiroki; SOMEYA Hiroyuki; UCHIDA Atsushi; YOSHIMURA Kazuyuki; DAVIS Peter
  IEICE technical report, Volume：110, Number：388, First page：169, Last page：172, 17 Jan. 2011
  We experimentally observe the synchronization in semiconductor lasers subject to a common drive signal with constant-amplitude random-phase. We show the parameter regions at which the outputs of the two response lasers can be highly correlated with each other even though the correlation between the drive and response lasers is very low.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110008676753, CiNii Books ID：AN10091178
• A-2-21 Fast physics random bit generation using bandwidth-enhanced chaotic semiconductor lasers with optical injection　　　　　　　　　　　　　　　
  Yamazaki Taiki; Morikatsu Shinichiro; Okumura Haruka; Aida Hiroki; Uchida Atsushi; Yoshimura Kazuyuki; Harayama Takahisa; Sunada Satoshi; Davis Peter
  Proceedings of the Society Conference of IEICE, Volume：2010, First page：52, Last page：52, 31 Aug. 2010
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110008123427, CiNii Books ID：AN10489017
• A-2-19 Amplification of noise in chaotic semiconductor lasers for random bit generation　　　　　　　　　　　　　　　
  Mikami Takuya; Aoyama Kota; Kanno Kazutaka; Uchida Atsushi
  Proceedings of the Society Conference of IEICE, Volume：2010, First page：50, Last page：50, 31 Aug. 2010
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110008123425, CiNii Books ID：AN10489017
• A-2-22 Physical random number generation using monolithically integrated chaotic semiconductor laser chips　　　　　　　　　　　　　　　
  Sunada Satoshi; Harayama Takahisa; Yoshimura Kazuyuki; Davis Peter; Teuzuki Ken; Uchida Atsushi
  Proceedings of the Society Conference of IEICE, Volume：2010, First page：53, Last page：53, 31 Aug. 2010
  最近、半導体レーザによるカオス現象を活用することで、GHzオーダでの超高速物理乱数生成が可能であることが示され、注日を集めている。その高速カオス現象の発生には、半導体レーザからの出射光を再びレーザに戻す、フィードバック機構を必要としているが、その構成において、光ファイバや光学素子等を使用しているため、系全体のサイズが大きく、乱数生成器として実用的なレベルまで小型化することは困難である。そこで本研究では、上記物理乱数生成器の小型化を日的として、カオス生成に必要な要素を全て半導体基板上に集積したカオスレーザを試作し、その乱数生成性能に関する評価を行った。
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110008123428, CiNii Books ID：AN10489017
• A-2-16 Lyapunov analysis in optically coupled semiconductor lasers subjected to delayed optical feedback　　　　　　　　　　　　　　　
  Kanno Kazutaka; Uchida Atsushi
  Proceedings of the Society Conference of IEICE, Volume：2010, First page：47, Last page：47, 31 Aug. 2010
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110008123422, CiNii Books ID：AN10489017
• Ultra-fast random number generation with bandwidth-enhanced chaos in semiconductor lasers　　　　　　　　　　　　　　　
  UCHIDA Atsushi; YAMAZAKI Taiki; MORIKATSU Shinichiro; OKUMURA Haruka; AIDA Hiroki; YOSHIMURA Kazuyuki; HARAYAMA Takahisa; DAVIS Peter
  IEICE technical report, Volume：110, Number：82, First page：231, Last page：234, 11 Jun. 2010
  We experimentally demonstrate random bit generation using multi-bit samples of bandwidth-enhanced chaos in semiconductor lasers. Chaotic fluctuation of laser output is generated in a semiconductor laser with optical feedback and the chaotic output is injected into a second semiconductor laser to obtain a chaotic intensity signal with bandwidth enhanced up to 16 GHz. The chaotic signal is converted to an 8-bit digital signal by sampling with a digital oscilloscope at 12.5 Giga samples per second (GS/s). Random bits are generated by bitwise exclusive-OR operation on corresponding bits in samples of the chaotic signal and its time-delayed signal. Statistical tests verify the randomness of bit sequences obtained using 1 to 6 bits per sample, corresponding to fast random bit generation rates from 12.5 to 75 Gigabit per second (Gb/s) (= 6 bit × 12.5 GS/s).
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110007890591, CiNii Books ID：AN10060800
• パリティ ｢半導体レｰザｰで乱数を高速生成｣　　　　　　　　　　　　　　　
  内田 淳史
  Volume：25, Number：5, First page：40, Last page：42, 2010
  丸善
• Experiment on fast physical random number generation with chaotic semiconductor lasers subject to optical feedback　　　　　　　　　　　　　　　
  UCHIDA Atsushi; HIRANO Kunihito; AMANO Kazuya; YAMAZAKI Taiki; YOSHIMORI Shigeru; YOSHIMURA Kazuyuki; DAVIS Peter
  IEICE technical report, Volume：109, Number：269, First page：171, Last page：176, 04 Nov. 2009
  Random number generators in digital information systems exploit physical entropy sources, such as electronic and photonic noise, to add unpredictability to deterministically generated pseudo-random sequences. However, there is a large gap between the generation rates achieved with existing physical sources and the high data rates of many computation and communication systems, which is a fundamental weakness in these systems. We show that good-quality random bit sequences can be generated at very fast bit rates using physical chaos in semiconductor lasers. Streams of bits which pass standard statistical tests for randomness have been generated at rates of up to 1.7 gigabit per second by sampling the fluctuating optical output of two chaotic lasers. This rate is an order of magnitude faster than that of previously reported devices for physical random bit generators with verified randomness.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110007504869, CiNii Books ID：AN10060800
• Generation and synchronization of bandwidth-enhanced chaos in semiconductor lasers with optical injection　　　　　　　　　　　　　　　
  OKUMURA Haruka; SOMEYA Hiroyuki; OOWADA Isao; KIDA Takahiko; AIDA Hiroki; UCHIDA Atsushi
  IEICE technical report, Volume：109, Number：269, First page：17, Last page：22, 04 Nov. 2009
  We experimentally observe the generation and synchronization of bandwidth-enhanced chaos in a semiconductor laser that is subject to optical injection from a second chaotic semiconductor laser with optical feedback. Effective bandwidth enhancement is achieved over 12GHz outside the injection locking range. Synchronization of chaos with a bandwidth greater than 12GHz is observed between the second and a third lasers under the injection locking condition. High-quality chaos synchronization is observed within the injection locking range.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110007504841, CiNii Books ID：AN10060800
• Synchronization of Chaos in Coupled Laser Systems and its Applications to Information-Communication Technology　　　　　　　　　　　　　　　
  UCHIDA Atsushi
  Systems, control and information, Volume：53, Number：8, First page：330, Last page：336, 15 Aug. 2009
  Institute of Systems, Control and Information Engineers, Japanese
  ISSN：0916-1600, CiNii Articles ID：110007341960, CiNii Books ID：AN10062329
• A-2-30 Fast random number generation by using chaotic semiconductor lasers　　　　　　　　　　　　　　　
  Hirano Kunihito; Amano Kazuya; Inoue Masaki; Naito Sunao; Someya Hiroyuki; Oowada Isao; Uchida Atsushi; Yoshimori Shigeru; Yoshimura Kazuyuki; Davis Peter
  Proceedings of the IEICE General Conference, Volume：2009, First page：81, Last page：81, 04 Mar. 2009
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110007127509, CiNii Books ID：AN10471452
• Leader-laggard relationship of chaos synchronization in mutually coupled vertical-cavity surface-emitting lasers with time delay　　　　　　　　　　　　　　　
  Mitsutoshi Ozaki; Hiroyuki Someya; Takaya Mihara; Atsushi Uchida; Shigeru Yoshimori; Krassimir Panajotov; Marc Sciamanna
  PHYSICAL REVIEW E, Volume：79, Number：2, First page：026210, Last page：7, Feb. 2009
  We experimentally and numerically observe synchronization of chaos in two mutually coupled vertical-cavity surface-emitting lasers (VCSELs) with time delay. We observe in-phase and antiphase synchronization of polarization-resolved chaotic temporal wave forms under the condition of wavelength matching. We investigate leader-laggard relationship between two chaotic wave forms of mutually coupled VCSELs and find that the laser with longer wavelength becomes the leader.
  AMER PHYSICAL SOC, English
  DOI：https://doi.org/10.1103/PhysRevE.79.026210
  DOI ID：10.1103/PhysRevE.79.026210, ISSN：1539-3755, CiNii Articles ID：120001371428, Web of Science ID：WOS:000263809800032
• 電子情報通信 ハンドブック/データベース　　　　　　　　　　　　　　　
  2009
  データベースの執筆(1群11編、非線形問題)
  電子情報通信学会
• Enhancement of generation speed for physical random number generator with chaotic lasers　　　　　　　　　　　　　　　
  山崎 泰基, 森勝 進一朗, 奥村 悠, 会田 裕貴, 内田 淳史, 吉村 和之, 原山 卓久, ディビス ピーター
  埼玉大学地域オｰプンイノベｰションセンタｰ紀要, Volume：2, Number：2, First page：75, Last page：78, 2009
  We experimentally demonstrate random bit generation using multi-bit samples of bandwidth-enhanced chaos in semiconductor lasers. Chaotic fluctuation of laser output is generated in a semiconductor laser with optical feedback and the chaotic output is injected into a second semiconductor laser to obtain a chaotic intensitysignal with bandwidth enhanced up to 16 GHz. The chaotic signal is converted to an 8-bit digital signal by sampling with a digital oscilloscope at 12.5 Giga samples per second (GS/s). Random bits are generated by bitwise exclusive-OR operation on corresponding bits in samples of the chaotic signal and its time-delayed signal. Statistical tests verify the randomness of bit sequences obtained using 1 to 6 bits per sample,corresponding to fast random bit generation rates from 12.5 to 75 Gigabit per second (Gb/s) (= 6 bit × 12.5 GS/s).
  Japanese
  ISSN：1883-8278, CiNii Articles ID：120002354130, CiNii Books ID：AA12486867
• Efficient Physical Random Bit Generation with Lasers　　　　　　　　　　　　　　　
  Takahisa Harayama; Atsushi Uchida; Kazuyuki Yoshimura; Peter Davis
  ICTON: 2009 11TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS, VOLS 1 AND 2, First page：791, Last page：791, 2009
  IEEE, English, Summary international conference
  Web of Science ID：WOS:000274048000204
• Chaotic polarization dynamics and chaos synchronization in VCSELs　　　　　　　　　　　　　　　
  Marc Sciamanna; Krassimir Panajotov; Ignace Gatare; Hugo Thienpont; Angel Valle; Mikel Arizaleta; Atsushi Uchida
  2009 IEEE/LEOS WINTER TOPICALS MEETING SERIES (WTM 2009), Volume：1, First page：114, Last page：+, 2009
  We review our recent results related to nonlinear polarization dynamics and chaos in VCSELs. The possibility to generate multimode chaos motivates the study of chaos synchronization in coupled VCSELs and its application for secure communications.
  IEEE, English
  DOI：https://doi.org/10.1109/LEOSWT.2009.4771684
  DOI ID：10.1109/LEOSWT.2009.4771684, Web of Science ID：WOS:000267006500059
• Synchronization of chaos in mutually coupled vertical-cavity surface-emitting lasers with time delay　　　　　　　　　　　　　　　
  Atsushi Uchida; Hiroyuki Someya; Mitsutoshi Ozaki; Kazuya Tanaka; Shigeru Yoshimori; Krassimir Panajotov; Marc Sciamanna
  2009 IEEE/LEOS WINTER TOPICALS MEETING SERIES (WTM 2009), Volume：1, First page：124, Last page：+, 2009
  We experimentally observe in-phase and anti-phase synchronization of chaos in two mutually-coupled vertical-cavity surface-emitting lasers. We investigate leader-laggard relationship between two chaotic waveforms and find that the laser with longer wavelength becomes the leader.
  IEEE, English
  DOI：https://doi.org/10.1109/LEOSWT.2009.4771689
  DOI ID：10.1109/LEOSWT.2009.4771689, Web of Science ID：WOS:000267006500064
• Impact of light polarization on chaos synchronization of mutually coupled VCSELs　　　　　　　　　　　　　　　
  Krassimir Panajotov; Marc Sciamanna; Hugo Thienpont; Atsushi Uchida
  OPTICS LETTERS, Volume：33, Number：24, First page：3031, Last page：3033, Dec. 2008
  We demonstrate that dynamical polarization switching in mutually coupled vertical-cavity surface-emitting lasers (VCSELs) has a profound impact on the chaotic dynamics in the system drastically improving the in-phase (anti-phase) synchronization between the modes of the two VCSELs with the same (orthogonal) polarizations. Furthermore, an exchange of the leader-laggard role is observed with the higher (lower) frequency VCSEL being the leader for lower (higher) coupling strength. (C) 2008 Optical Society of America
  OPTICAL SOC AMER, English
  DOI：https://doi.org/10.1364/OL.33.003031
  DOI ID：10.1364/OL.33.003031, ISSN：0146-9592, CiNii Articles ID：80020057766, PubMed ID：19079531, Web of Science ID：WOS:000262609000052
• Fast physical random bit generation with chaotic semiconductor lasers　　　　　　　　　　　　　　　
  Atsushi Uchida; Kazuya Amano; Masaki Inoue; Kunihito Hirano; Sunao Naito; Hiroyuki Someya; Isao Oowada; Takayuki Kurashige; Masaru Shiki; Shigeru Yoshimori; Kazuyuki Yoshimura; Peter Davis
  NATURE PHOTONICS, Volume：2, Number：12, First page：728, Last page：732, Dec. 2008
  Random number generators in digital information systems make use of physical entropy sources such as electronic and photonic noise to add unpredictability to deterministically generated pseudo-random sequences(1,2). However, there is a large gap between the generation rates achieved with existing physical sources and the high data rates of many computation and communication systems; this is a fundamental weakness of these systems. Here we show that good quality random bit sequences can be generated at very fast bit rates using physical chaos in semiconductor lasers. Streams of bits that pass standard statistical tests for randomness have been generated at rates of up to 1.7 Gbps by sampling the fluctuating optical output of two chaotic lasers. This rate is an order of magnitude faster than that of previously reported devices for physical random bit generators with verified randomness. This means that the performance of random number generators can be greatly improved by using chaotic laser devices as physical entropy sources.
  NATURE PUBLISHING GROUP, English
  DOI：https://doi.org/10.1038/nphoton.2008.227
  DOI ID：10.1038/nphoton.2008.227, ISSN：1749-4885, CiNii Articles ID：80019939013, Web of Science ID：WOS:000261740400011
• Invariance of Frequency Difference in Nonresonant Entrainment of Detuned Oscillators Induced by Common White Noise　　　　　　　　　　　　　　　
  Kazuyuki Yoshimura; Peter Davis; Atsushi Uchida
  PROGRESS OF THEORETICAL PHYSICS, Volume：120, Number：4, First page：621, Last page：633, Oct. 2008
  We studied the entrainment of two uncoupled detuned limit cycle oscillators subjected to a common external white Gaussian noise. We found a novel type of entrainment behavior for a general class of oscillators: as noise intensity increases, the phases of the two oscillators come to be almost always locked with each other although there is no frequency locking in the sense that the mean frequency difference remains the same as the natural frequency difference. We also show that a common noise induces a macroscopic oscillation with no frequency locking in a population of detuned oscillators.
  PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE, English
  DOI：https://doi.org/10.1143/PTP.120.621
  DOI ID：10.1143/PTP.120.621, ISSN：0033-068X, CiNii Articles ID：110006967878, Web of Science ID：WOS:000261165100001
• Local conditional Lyapunov exponent characterization of consistency of dynamical response of the driven Lorenz system　　　　　　　　　　　　　　　
  Atsushi Uchida; Kazuyuki Yoshimura; Peter Davis; Shigeru Yoshimori; Rajarshi Roy
  PHYSICAL REVIEW E, Volume：78, Number：3, First page：036203, Last page：5, Sep. 2008
  Local conditional Lyapunov exponents are introduced and plotted in dynamical phase space to visualize the local susceptibility of the Lorenz system driven by chaos and noise signals when the system produces consistent response outputs. The dependence of the distribution of the local conditional Lyapunov exponent on changes in the drive signal is investigated. We consider the existence of multiple basins of consistent response for the same drive signal and the dependence of the basins on the drive signal.
  AMER PHYSICAL SOC, English
  DOI：https://doi.org/10.1103/PhysRevE.78.036203
  DOI ID：10.1103/PhysRevE.78.036203, ISSN：1539-3755, CiNii Articles ID：120001371231, Web of Science ID：WOS:000259683100026
• Experimental observation of generation and synchronization of chaos in mutually coupled vertical-cavity surface-emitting lasers with two time delays　　　　　　　　　　　　　　　
  SOMEYA Hiroyuki; TANAKA Kazuya; UCHIDA Atsushi; YOSHIMORI Shigeru
  IEICE technical report, Volume：108, Number：103, First page：15, Last page：20, 27 Jun. 2008
  Vertical-cavity surface-emitting lasers (VCSELs) have been considered as novel devices for optical communications and wireless local area networks. In this study, we experimentally investigate of generation and synchronization of chaos in mutually coupled VCSELs with two time delays. We observe three kinds of different RF spectra and find that the couple strength ratio of two time delays is responsible for the RF spectra.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110006937465, CiNii Books ID：AN10060800
• Consistency in nonlinear dynamical systems　　　　　　　　　　　　　　　
  UCHIDA Atsushi; YIP Hoipang; YOSHIMORI Shigeru
  IPSJ SIG technical reports, Volume：2008, Number：58, First page：31, Last page：36, 19 Jun. 2008
  Many nonlinear dynamical systems have an ability to generate consistent outputs when driven by a repeated external signal. Consistency is defined as the reproducibility of response waveforms in a nonlinear dynamical system driven repeatedly by a signal, starting from different initial conditions of the system. Consistency of dynamics is essential for information transmission in biological and physiological systems and for reproduction of spatiotemporal patterns in nature. We experimentally investigate consistency of response output in a microchip solid-state laser and a Mackey-Glass electronic circuit driven repeatedly by chaos and colored noise.
  Information Processing Society of Japan (IPSJ), Japanese
  ISSN：0919-6072, CiNii Articles ID：110006839046, CiNii Books ID：AA12055912
• Consistency in nonlinear dynamical systems　　　　　　　　　　　　　　　
  UCHIDA Atsushi; YIP Hoipang; YOSHIMORI Shigeru
  Volume：108, Number：101, First page：7, Last page：12, 19 Jun. 2008
  Japanese
  CiNii Articles ID：10031000483, CiNii Books ID：AN10091178
• 独立成分分析を用いた半導体レーザ混合カオス信号の分離　　　　　　　　　　　　　　　
  田代洋人; 倉屋昌彦; 内田淳史; 吉森茂; 梅野健
  Volume：55th, Number：3, 2008
  J-Global ID：200902207594440558
• Experiment on common-chaotic-signal induced synchronization in semiconductor lasers
  内田淳史、大和田功、奥村悠、吉森茂、吉村和之、ディビス ピーター
  埼玉大学工学部紀要, Volume：42, Number：42, First page：32, Last page：35, 2008
  We experimentally observe synchronization of two semiconductor lasers commonly driven by a chaotic semiconductor laser subject to optical feedback. Under condition that the relaxation oscillation frequency is matched between the two response lasers, but mismatched between the drive and the two response lasers, we show that it is possible to observe strongly correlated synchronization between the two response lasers even when the correlation between the drive and response lasers is low. We also introduce separate optical feedback to the two response lasers. The maximum correlation between the two response lasers is obtained when the phase of the feedback light is matched between the two response lasers, while the minimum correlation is observed when the difference in the optical phase is π.
  埼玉大学工学部, Japanese
  CiNii Articles ID：120005373731
• Experiment on fast physical random number generation with chaotic semiconductor lasers
  内田淳史、天野和也、平野邦仁、吉森茂、吉村和之、ディビス ピーター
  Report of Comprehensive Open Innovation Center, Saitama University, Volume：1, Number：1, First page：73, Last page：76, 2008
  Random number generators in digital information systems exploit physical entropy sources, such as electronic and photonic noise, to add unpredictability to deterministically generated pseudo-random sequences. However, there is a large gap between the generation rates achieved with existing physical sources and the high data rates of many computation and communication systems, which is a fundamental weakness in these systems. Here we show that good-quality random bit sequences can be generated at very fast bit rates using physical chaos in semiconductor lasers. Streams of bits which pass standard statistical tests for randomness have been generated at rates of up to 1.7 gigabit per second by sampling the fluctuating optical output of two chaotic lasers. This rate is an order of magnitude faster than that of previously reported devices for physical random bit generators with verified randomness.
  埼玉大学地域オープンイノベーションセンター, Japanese
  ISSN：1883-8278, CiNii Articles ID：120001493942
• Numerical analysis on chaos synchronization in semiconductor lasers subject to a common drive signal　　　　　　　　　　　　　　　
  Isao Oowada; Toru Yamamoto; Atsushi Uchida; Shigeru Yoshimori; Kazuyuki Yoshimura; Jun Muramatsu; Shin-Itiro Goto; Peter Davis
  IEEJ Transactions on Electronics, Information and Systems, Volume：128, Number：5, First page：12, Last page：774, 2008
  We numerically observe chaos synchronization of two semiconductor lasers commonly driven by a chaotic semiconductor laser subject to optical feedback. We observe strongly correlated chaos synchronization between the two response lasers even when the correlation between the drive and response lasers is low. We show that the cross correlation between the two responses is larger than that between drive and responses over a wide parameter region. © 2008 The Institute of Electrical Engineers of Japan.
  Institute of Electrical Engineers of Japan, English
  DOI：https://doi.org/10.1541/ieejeiss.128.768
  DOI ID：10.1541/ieejeiss.128.768, ISSN：1348-8155, CiNii Articles ID：10021132425, SCOPUS ID：72549093486
• Numerical analysis on chaos synchronization in semiconductor lasers subject to a common drive signal　　　　　　　　　　　　　　　
  Isao Oowada; Toru Yamamoto; Atsushi Uchida; Shigeru Yoshimori; Kazuyuki Yoshimura; Jun Muramatsu; Shin-Itiro Goto; Peter Davis
  IEEJ Transactions on Electronics, Information and Systems, Volume：128, Number：5, First page：12, Last page：774, 2008
  We numerically observe chaos synchronization of two semiconductor lasers commonly driven by a chaotic semiconductor laser subject to optical feedback. We observe strongly correlated chaos synchronization between the two response lasers even when the correlation between the drive and response lasers is low. We show that the cross correlation between the two responses is larger than that between drive and responses over a wide parameter region. © 2008 The Institute of Electrical Engineers of Japan.
  Institute of Electrical Engineers of Japan, English
  DOI：https://doi.org/10.1541/ieejeiss.128.768
  DOI ID：10.1541/ieejeiss.128.768, ISSN：1348-8155, CiNii Articles ID：10021132425, SCOPUS ID：72549093486
• Dual synchronization of chaos in Mackey-Glass electronic circuits with time-delayed feedback　　　　　　　　　　　　　　　
  SANO Satoshi; UCHIDA Atsushi; YOSHIMORI Shigeru
  Bulletin of science and engineering, Takushoku University, Volume：10, Number：1, First page：97, Last page：98, Oct. 2007
  We experimentally and numerically demonstrate the dual synchronization of chaos in two pairs of one-way coupled Mackey-Glass electronic circuits with time-delayed feedback. The output of the two drive circuits are mixed and used both for the feedback signal to the two drive circuits and for the transmission signal to the two response circuits. We investigate the regions for achieving dual synchronization of chaos when the delay time is mismatched between the drive and response circuits.
  Takushoku University, Japanese
  ISSN：0919-8253, CiNii Articles ID：110006992996, CiNii Books ID：AN10406100
• Electro-dynamical Analysis of Off-Axial DC Magnetron Sputtering　　　　　　　　　　　　　　　
  YOSHIMORI Shigeru; UCHIDA Atsush; ARIHARA Naoki
  Bulletin of science and engineering, Takushoku University, Volume：10, Number：1, First page：95, Last page：96, Oct. 2007
  An important role in the superconducting electronics will be the development of key technology to synthesize a good quality high Tc superconducting (HTS) thin film by using the conventional and inexpensive deposition method. We developed the off-axial DC magnetron sputtering apparatus for inexpensive experiment of the High Tc Superconducting thin film deposition. In this paper, we report the sputtering target optimization by the electro-dynamical analysis. We found the optimum target structure and composition for YBa_2Cu_3O_7 thin film deposition.
  Takushoku University, Japanese
  ISSN：0919-8253, CiNii Articles ID：110006992995, CiNii Books ID：AN10406100
• Fractal dimension of chaotic light scattering in polyhedral mirror-ball structures　　　　　　　　　　　　　　　
  AMANO Kazuya; NARIMASTU Daisuke; SOTOME Satoshi; UCHIDA Atsushi; YOSHIMORI Shigeru
  IEICE technical report, Volume：107, Number：185, First page：13, Last page：18, 31 Jul. 2007
  We experimentally observe fractal patterns of chaotic light scattering in regular-polyhedral mirror-ball structures that consist of spherical reflectors located at the vertices of polyhedra as optical scattering devices. We measure the fractal dimension of the basin boundaries of the light scattering patterns in the regular-polyhedral mirror-ball structures.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110006420468, CiNii Books ID：AN10060800
• Consistency in a driven Mackey-Glass electronic circuit　　　　　　　　　　　　　　　
  YIP Hoipang; SANO Satoshi; UCHIDA Atsushi; YOSHIMORI Shigeru
  IEICE technical report, Volume：107, Number：185, First page：7, Last page：11, 31 Jul. 2007
  We experimentally observe consistency in a Mackey-Glass electronic circuit (MGC) repeatedly driven by a colored noise signal. We discovered that, multiple consistent response signal patterns are observed by driving the MGC with colored noise. To confirm our experimental observations, we use a numerical model for consistency of MGC. We found that consistency is obtained at large drive signals. More than one type of response waveform patterns are observed, which we call multiple basins of consistency.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110006420467, CiNii Books ID：AN10060800
• Experiment on chaos synchronization in semiconductor lasers subject to a common chaotic drive signal　　　　　　　　　　　　　　　
  OOWADA Isao; YAMAMOTO Toru; YIP Hoipang; ARIIZUMI Hiroki; UCHIDA Atsushi; YOSHIMORI Shigeru; YOSHIMURA Kazuyuki; MURAMATSU Jun; GOTO Shin-itiro; DAVIS Peter
  IEICE technical report, Volume：107, Number：184, First page：55, Last page：60, 30 Jul. 2007
  We experimentally and numerically observe synchronization of two semiconductor lasers commonly driven by a chaotic semiconductor laser subject to optical feedback. Under condition that the relaxation oscillation frequency is matched between the two response lasers, but mismatched between the drive and the two response lasers, we show that it is possible to observe strongly correlated synchronization between the two response lasers even when the correlation between the drive and response lasers is low. We also show that the cross correlation between the two responses is larger than that between drive and responses over a wide parameter region.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110006420459, CiNii Books ID：AN10060800
• Experimental observation on lag synchronization of chaos in mutually coupled vertical-cavity surface-emitting lasers　　　　　　　　　　　　　　　
  SOMEYA Hiroyuki; OZAKI Mitsutoshi; TANAKA Kazuya; UCHIDA Atsushi; YOSHIMORI Shigeru
  IEICE technical report, Volume：107, Number：184, First page：49, Last page：54, 30 Jul. 2007
  We experimentally observe synchronization of chaos in two mutually-coupled vertical-cavity surface-emitting lasers (VCSELs). We observe polarization-resolved temporal waveforms and find in-phase and anti-phase synchronization of chaos under the condition of injection locking. We investigate leader-laggard relationship between two chaotic waveforms of mutually coupled VCSELs and find that the laser with longer wavelength becomes the leader. The leader-laggard relationship is related to the characteristics of injection locking in optically coupled VCSELs.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110006420458, CiNii Books ID：AN10060800
• AS-2-9 Consistency of laser systems driven by an external signal　　　　　　　　　　　　　　　
  Uchida Atsushi; Yoshimori Shigeru; McAllister Ryan; Roy Rajarshi
  Proceedings of the IEICE General Conference, Volume：2007, First page："S, Last page：41"-"S-42", 07 Mar. 2007
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110006460356, CiNii Books ID：AN10471452
• A-2-9 Lag synchronization of chaos and symmetry breaking in coupled vertical-cavity surface-emitting lasers　　　　　　　　　　　　　　　
  Ozaki Mitsutoshi; Someya Hiroyuki; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the IEICE General Conference, Volume：2007, First page：56, Last page：56, 07 Mar. 2007
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110006459961, CiNii Books ID：AN10471452
• A-2-11 Analysis of fractal dimension of light scattering pattern in a mirror-ball polyhedral structure　　　　　　　　　　　　　　　
  Narimatsu Daisuke; Amano Kazuya; Sotome Satoshi; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the IEICE General Conference, Volume：2007, First page：58, Last page：58, 07 Mar. 2007
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110006459963, CiNii Books ID：AN10471452
• A-2-6 Generation and synchronization of chaos in a Mackey-Glass electronic circuit with multiple time delays　　　　　　　　　　　　　　　
  Tateno Masahiko; Kuraya Masahiko; Sano Satoshi; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the IEICE General Conference, Volume：2007, First page：53, Last page：53, 07 Mar. 2007
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110006459958, CiNii Books ID：AN10471452
• A-2-14 Blind source separation of chaos by independent component analysis　　　　　　　　　　　　　　　
  Kuraya Masahiko; Sano Satoshi; Uchida Atsushi; Yoshimori Shigeru; Umeno Ken
  Proceedings of the IEICE General Conference, Volume：2007, First page：61, Last page：61, 07 Mar. 2007
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110006459966, CiNii Books ID：AN10471452
• A-2-8 Numerical analysis on synchronization in semiconductor lasers subject to a common chaotic drive signal　　　　　　　　　　　　　　　
  Oowada I.; Yamamoto T.; Yip H.; Uchida A.; Yoshimori S.; Yoshimura K.; Muramatsu J.; Goto S.; Davis P.
  Proceedings of the IEICE General Conference, Volume：2007, First page：55, Last page：55, 07 Mar. 2007
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110006459960, CiNii Books ID：AN10471452
• A-2-4 Experiment on synchronization in semiconductor lasers subjects to a common chaotic drive signal　　　　　　　　　　　　　　　
  Yamamoto Toru; Oowada Isao; Yip Hoipang; Uchida Atsushi; Yoshimori Shigeru; Yoshimura Kazuyuki; Muramatsu Jun; Goto Shin-itiro; Davis Peter
  Proceedings of the IEICE General Conference, Volume：2007, First page：51, Last page：51, 07 Mar. 2007
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110006459956, CiNii Books ID：AN10471452
• Consistency of nonlinear system response to complex drive signals　　　　　　　　　　　　　　　
  UCHIDA Atsushi; YOSHIMORI Shigeru; MCALLISTER Ryan; ROY Rajarshi
  Volume：357, First page：15, Last page：18, 17 Jan. 2007
  Japanese
  CiNii Articles ID：10018703857, CiNii Books ID：AA11604414
• Separation of mixed chaotic signals in microchip lasers by independent component analysis　　　　　　　　　　　　　　　
  Atsushi Uchida; Masahiko Kuraya; Shigeru Yoshimori; Ken Umeno
  Conference on Lasers and Electro-Optics Europe - Technical Digest, 2007, [Reviewed]
  English
  DOI：https://doi.org/10.1109/CLEOE-IQEC.2007.4386999
  DOI ID：10.1109/CLEOE-IQEC.2007.4386999, SCOPUS ID：51249120384
• Characteristics of Chaos Synchronization in Semiconductor Lasers Subject to Polarization-rotated Optical Feedback　　　　　　　　　　　　　　　
  SHIBASAKI Nagisa; UCHIDA Atsushi; YOSHIMORI Shigeru
  Bulletin of science and engineering, Takushoku University, Volume：9, Number：4, First page：85, Last page：86, 20 Oct. 2006
  We numerically investigate the detailed characteristics of chaos synchronization in semiconductor lasers subject to polarization-rotated optical feedback. The emission of the dominant TE mode of a drive laser is rotated 90 degrees and fed back to the laser with time delay. The polarization-rotated TE mode is also injected with time delay into the TM mode of a second laser. Two types of synchronization with different time-lags are found, as in the case for synchronization in semiconductor lasers with non-rotated optical feedback. However, a significant difference to the non-rotated optical feedback case is that neither of the two types of synchronization requires matching of optical carrier frequency between the two lasers.
  Takushoku University, Japanese
  ISSN：0919-8253, CiNii Articles ID：110006405612, CiNii Books ID：AN10406100
• Analysis of Step Edge Josephson Junction by use of Two Dimensional Ginzburg-Landau Equation　　　　　　　　　　　　　　　
  YOSHIMORI Shigeru; UCHIDA Atsushi
  Bulletin of science and engineering, Takushoku University, Volume：9, Number：4, First page：81, Last page：82, 20 Oct. 2006
  Characteristics such as temperature dependence of the critical current and space distribution of the order parameter of step edge type Josephson junction were analyzed by use of two dimensional Ginzburg-Landau equation. We found that the solution could be expressed by use of the Jacobian elliptic function. The relationship between the supercurrent and phase difference φ is proportional to sinφ.
  Takushoku University, Japanese
  ISSN：0919-8253, CiNii Articles ID：110006405610, CiNii Books ID：AN10406100
• A-2-13 Synchronization of chaos in mutually-coupled vertical-cavity surface-emitting lasers　　　　　　　　　　　　　　　
  Ozaki Mitsutoshi; Someya Hiroyuki; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the Society Conference of IEICE, Volume：2006, First page：44, Last page：44, 07 Sep. 2006
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110006216438, CiNii Books ID：AN10489017
• A-2-21 Consistency in Mackey-Glass Electronic Circuits Driven by Colored Noise　　　　　　　　　　　　　　　
  Yip Hoipang; Sano Satoshi; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the IEICE General Conference, Volume：2006, First page：57, Last page：57, 08 Mar. 2006
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110006217147, CiNii Books ID：AN10471452
• A-2-22 Characteristics of light scattering in a fractal mirror ball structure　　　　　　　　　　　　　　　
  Sotome Satoshi; Tashiro Shinya; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the Society Conference of IEICE, Volume：2005, First page：53, Last page：53, 07 Sep. 2005
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110004740454, CiNii Books ID：AN10489017
• A-2-12 Dual Synchronization of Chaos in Mackey-Glass Electronic Circuits with Time-Delayed Feedback　　　　　　　　　　　　　　　
  Sano Satoshi; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the Society Conference of IEICE, Volume：2005, First page：43, Last page：43, 07 Sep. 2005
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110004740444, CiNii Books ID：AN10489017
• A-2-21 Experimental Observation of Consistency in Mackey-Glass Electronic Circuits　　　　　　　　　　　　　　　
  Yip Hoipang; Sano Satoshi; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the Society Conference of IEICE, Volume：2005, First page：52, Last page：52, 07 Sep. 2005
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110004740453, CiNii Books ID：AN10489017
• A-2-11 Synchronization of chaos in mutually-coupled vertical-cavity surface-emitting lasers　　　　　　　　　　　　　　　
  Ozaki Mitsutoshi; Shibasaki Nagisa; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the Society Conference of IEICE, Volume：2005, First page：42, Last page：42, 07 Sep. 2005
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110004740443, CiNii Books ID：AN10489017
• A-2-20 Consistency in a driven Rossler model　　　　　　　　　　　　　　　
  Uchida Atsushi; Yoshimori Shigeru; Roy Rajarshi
  Proceedings of the Society Conference of IEICE, Volume：2005, First page：51, Last page：51, 07 Sep. 2005
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110004740452, CiNii Books ID：AN10489017
• A-2-15 Generation and Synchronization of Chaos in Mackey-Glass Electronic Circuits with Time-Delay　　　　　　　　　　　　　　　
  Sano Satoshi; Shibasaki Nagisa; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the IEICE General Conference, Volume：2005, First page：54, Last page：54, 07 Mar. 2005
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110004737788, CiNii Books ID：AN10471452
• A-2-14 Consistency of nonlinear system driven by chaos and noise signals　　　　　　　　　　　　　　　
  Uchida Atsushi; Yoshimori Shigeru; Ryan McAllister; Rajarshi Roy
  Proceedings of the IEICE General Conference, Volume：2005, First page：53, Last page：53, 07 Mar. 2005
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110004737787, CiNii Books ID：AN10471452
• Secure Communication with Laser Chaos　　　　　　　　　　　　　　　
  UCHIDA Atsushi; YOSHIMORI Shigeru
  Bulletin of science and engineering, Takushoku University, Volume：9, Number：2, First page：3, Last page：8, 20 Oct. 2004
  Secure communications with chaotic lasers have attracted increasing interests all over the world. We overview recent technologies of secure communications with chaotic lasers. We describe some techniques for message encoding and decoding based on synchronization of chaos. We quantitatively evaluate the degree of security for the techniques of secure communications with chaos. A new approach to secure communications using chaos based on information theoretic security is described.
  Takushoku University, Japanese
  ISSN：0919-8253, CiNii Articles ID：110004686096, CiNii Books ID：AN10406100
• Secure Communication with Chaos　　　　　　　　　　　　　　　
  UCHIDA Atsushi; YOSHIMORI Shigeru
  Japanese journal of optics, Volume：33, Number：8, First page：454, Last page：460, 10 Aug. 2004
  Japanese
  ISSN：0389-6625, CiNii Articles ID：10013444385, CiNii Books ID：AN00080324
• Synchronization of chaos in microchip lasers and its communication applications　　　　　　　　　　　　　　　
  Atsushi Uchida; Shigeru Yoshimori
  Comptes Rendus Physique, Volume：5, Number：6, First page：643, Last page：656, Jul. 2004
  We overview some experimental and numerical demonstrations on the synchronization of chaos and its communication applications using Nd:YVO4 microchip solid-state lasers. Synchronization of chaos is achieved with several coupling configurations. Several encoding and decoding schemes for communication applications are also demonstrated by using the synchronization of chaos in microchip lasers. A new approach to secure communications using chaos based on information theoretic security is introduced. © 2004 Académie des sciences. Published by Elsevier SAS. All rights reserved.
  English, Book review
  DOI：https://doi.org/10.1016/j.crhy.2004.05.001
  DOI ID：10.1016/j.crhy.2004.05.001, ISSN：1631-0705, SCOPUS ID：3342972844
• Dual Synchronization of Chaos in One-Way Coupled Microchip Lasers　　　　　　　　　　　　　　　
  YOSHIMORI Shigeru; Uchida Atsushi; KINUGAWA Satoshi; MATSUURA Takanori
  Bulletin of science and engineering, Takushoku University, Volume：9, Number：1, First page：73, Last page：74, 25 Jan. 2004
  We experimentally demonstrate the dual synchronization of chaos in two pairs of Nd: YVO_4 microchip lasers in a one-wat coupling configuration over one transmission channel. Dual synchronization is achieved when the optical frequency is matched between the corresponding pairs of lasers by using injection locking. Under the condition of the injection locking between both of the master lasers and the slave lasers, the injection locking is alternately achieved and the accuracy of dual synchronization is degrated.
  Takushoku University, Japanese
  ISSN：0919-8253, CiNii Articles ID：110004686081, CiNii Books ID：AN10406100
• Dual synchronization of chaos in coupled Colpitts circuits　　　　　　　　　　　　　　　
  Kawano Makito; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the Society Conference of IEICE, Volume：2002, First page：35, Last page：35, 20 Aug. 2002
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110004088401, CiNii Books ID：AN10489017
• Dual synchronization of chaos in one-way coupled microchip lasers　　　　　　　　　　　　　　　
  Matsuura Takanori; Kinugawa Satoshi; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the Society Conference of IEICE, Volume：2002, First page：34, Last page：34, 20 Aug. 2002
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110004088400, CiNii Books ID：AN10489017
• Synchronization of chaos in microchip lasers by using integration-type incoherent feedback method　　　　　　　　　　　　　　　
  Matsuura T.; Kinugawa S.; Uchida A.; Yoshimori S.
  Proceedings of the IEICE General Conference, Volume：2002, First page：47, Last page：47, 07 Mar. 2002
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110003496238, CiNii Books ID：AN10471452
• Experiments on chaos synchronization in He-Ne lasers　　　　　　　　　　　　　　　
  Shiba Takayoshi; Higa Ken-ichi; Uchida Atsushi; Yoshimori Shigeru; Kuwashima Fumiyoshi; Iwasawa Hiroshi
  Proceedings of the IEICE General Conference, Volume：2002, First page：46, Last page：46, 07 Mar. 2002
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110003496237, CiNii Books ID：AN10471452
• Synchronization of Chaos in One-way Coupled Colpitts Oscillators　　　　　　　　　　　　　　　
  Takahashi Koji; Kawano Makito; Uchida Atsushi; Yoshimori Shigeru
  Proceedings of the IEICE General Conference, Volume：2002, First page：48, Last page：48, 07 Mar. 2002
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110003496239, CiNii Books ID：AN10471452
• Synchronization of chaos between two microchip lasers by using incoherent feedback method　　　　　　　　　　　　　　　
  Matsuura T.; Kinugawa S.; Uchida A.; Yoshimori S.
  Proceedings of the Society Conference of IEICE, Volume：2001, First page：43, Last page：43, 29 Aug. 2001
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110003348422, CiNii Books ID：AN10489017
• Synchronization of chaos in Colpitts oscillators　　　　　　　　　　　　　　　
  Takahashi K.; Kawano M.; Uchida A.; Yoshimori S.
  Proceedings of the Society Conference of IEICE, Volume：2001, First page：42, Last page：42, 29 Aug. 2001
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110003348421, CiNii Books ID：AN10489017
• Generation of fast chaotic oscillations in a Chua circuit　　　　　　　　　　　　　　　
  Kawano M.; Takahashi K.; Uchida A.; Yoshimori S.
  Proceedings of the Society Conference of IEICE, Volume：2001, First page：41, Last page：41, 29 Aug. 2001
  The Institute of Electronics, Information and Communication Engineers, Japanese
  CiNii Articles ID：110003348420, CiNii Books ID：AN10489017
• Synchronization of chaos in microchip lasers by using incoherent feedback method　　　　　　　　　　　　　　　
  UCHIDA Atsushi; KINUGAWA Satoshi; YOSHIMORI Shigeru
  IEICE technical report. Nonlinear problems, Volume：100, Number：680, First page：117, Last page：124, 09 Mar. 2001
  We have experimentally demonstrated chaos synchronization in two Nd:YVO_4 microchip lasers by using optical injection. Since the condition of the chaos synchronization is strongly dependent on the injection locking range, it is easy to synchronize chaos of the master laser with that of unauthorized lasers if the optical frequencies are matched to each other. To improve the disadvantage, we have proposed a new chaos-synchronization method based on incoherent feedback to the pumping power by using the value proportional to the difference between the peak heights of the electrical amplitude in two laser outputs. We can achieve narrow tolerable region of chaos synchronization even if there exists parameter mismatching between the two lasers, because this method requires the matching of population inversion between the two lasers instead of electrical fields without injection locking effect.
  The Institute of Electronics, Information and Communication Engineers, Japanese
  ISSN：0913-5685, CiNii Articles ID：110003292471, CiNii Books ID：AN10060800
• Secure Communications Using Laser Chaos　　　　　　　　　　　　　　　
  UCHIDA Atsushi; YOSHIMORI Shigeru; OGAWA Takeshi; SHINOZUKA Masahiro; SHIMAMURA Yoshihide; KANNARI Fumihoko
  The Review of laser engineering, Volume：28, Number：10, First page：682, Last page：689, 15 Oct. 2000
  Japanese
  ISSN：0387-0200, CiNii Articles ID：10005723697, CiNii Books ID：AN00255326

• 光リザーバーコンピューティング ー原理と実装ー　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史
  共立出版, Feb. 2024
  Total pages：258
  ISBN：9784320125735
• Reservoir Computing: Theory, Physical Implementations, and Applications (Chapter 16, Performance improvement of delay-based photonic reservoir computing)　　　　　　　　　　　　　　　
  K. Kanno and A. Uchida
  Springer Verlag, Sep. 2021
  Total pages：458
  ISBN：9789811316869
• 複雑系フォトニクス レーザカオスの同期と光情報通信への応用　　　　　　　　　　　　　　　
  内田 淳史
  共立出版, Apr. 2016
  Total pages：314
  ISBN：9784320035980
• Optical Communication with Chaotic Lasers, -Applications of Nonlinear Dynamics and Synchronization-　　　　　　　　　　　　　　　
  A. Uchida
  Wiley-VCH, Jan. 2012
  Total pages：640, Responsible for pages：640
  ISBN：9783527408696

• 電気光遅延システムを用いた深層学習における拡張DFA法のための非線形関数の複雑性への依存性　　　　　　　　　　　　　　　
  永塚 悠翔, 野上 倫, 新山 友暁, 砂田 哲, 内田 淳史, 菅野 円隆
  Mar. 2024, [Domestic conference]
• 相互結合された半導体レーザにおける光周波数差検知によるリーダ・ラガード関係　　　　　　　　　　　　　　　
  平 英駿, 巳鼻 孝朋, Andre Roehm, 菅野 円隆, 内田 淳史, 堀﨑 遼一, 成瀬 誠
  Mar. 2024, [Domestic conference]
• 制御駆動された物理ニューラルネットワークのノイズ頑強性　　　　　　　　　　　　　　　
  粟野 貴斗, 砂田 哲, 新山 友暁, レーム アンドレ, 菅野 円隆, 内田 淳史
  Mar. 2024, [Domestic conference]
• 光リザーバーコンピューティングと強化学習の進展　　　　　　　　　　　　　　　
  内田 淳史
  Mar. 2024, [Invited], [Domestic conference]
• Reservoir computing and decision making for photonic artificial intelligence　　　　　　　　　　　　　　　
  A. Uchida
  Mar. 2024, [International conference]
• Reservoir computing with attention mechanism: Improving chaotic time-series forecasting　　　　　　　　　　　　　　　
  F. Koester,K. Kanno, J. Ohkubo, and A. Uchida
  Mar. 2024, [International conference]
• Solving multi-armed bandit problems using a chaotic microresonator comb　　　　　　　　　　　　　　　
  J. Cuevas, R. Iwami, A. Uchida, K. Minoshima, and N. Kuse
  Mar. 2024, [International conference]
• リザーバコンピューティングを用いた半導体レーザダイナミクスの分岐と複製　　　　　　　　　　　　　　　
  川上 敦也, 菅野 円隆, 内田 淳史
  Mar. 2024, [Domestic conference]
• 半導体レーザネットワークにおける多段バンディットアルゴリズムを用いた意思決定　　　　　　　　　　　　　　　
  佐々木 圭悟, 内田 淳史
  Mar. 2024, [Domestic conference]
• 時空間ダイナミクスを用いたマルチクライアントの協力的意思決定　　　　　　　　　　　　　　　
  武塙 賢人, 内田 淳史
  Mar. 2024, [Domestic conference]
• 拡張ダイレクトフィードバックアライメントを用いた最適制御に基づく物理深層学習の実験実装　　　　　　　　　　　　　　　
  野上 倫, 菅野 円隆, 新山 友暁, 砂田 哲, 内田 淳史
  Mar. 2024, [Domestic conference]
• 多モード半導体レーザを用いた意思決定の加速原理モデルの調査　　　　　　　　　　　　　　　
  岩見 龍吾, 内田 淳史
  Mar. 2024, [Domestic conference]
• 戻り光を有する半導体レーザーの間欠性カオスにおける非線形ダイナミクスと予測　　　　　　　　　　　　　　　
  小原 翔馬, 菅野 円隆, 内田 淳史, 黒川 弘章
  Feb. 2024, [Domestic conference]
• Photonic artificial intelligence: Reservoir computing and decision making based on complex photonics　　　　　　　　　　　　　　　
  A. Uchida
  Feb. 2024, [Invited], [International conference]
• Integration of attention mechanism in reservoir computing for time series forecasting　　　　　　　　　　　　　　　
  F. Koester, K. Kanno, J. Ohkubo, and A. Uchida
  Jan. 2024, [International conference]
• Mode concentration of chaotic dynamics in a multimode semiconductor laser for decision making　　　　　　　　　　　　　　　
  R. Iwami, K. Kanno, and A. Uchida
  Jan. 2024, [International conference]
• 光リザーバーコンピューティングの近年の進展　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史
  Nov. 2023, [Invited], [Domestic conference]
• リザーバコンピューティングを用いた戻り光半導体レーザカオスの予測と複製　　　　　　　　　　　　　　　
  川上 敦也, 菅野 円隆, 内田 淳史
  Nov. 2023, [Domestic conference]
• 光リザーバコンピューティングと光意思決定の最新研究動向　　　　　　　　　　　　　　　
  内田 淳史
  Nov. 2023, [Invited], [Domestic conference]
• エコーステートネットワークを用いた半導体レーザにおける突発的現象の予測と検知　　　　　　　　　　　　　　　
  小原 翔馬, 菅野 円隆, 内田 淳史, 黒川 弘章
  Oct. 2023, [Domestic conference]
• Synchronization and power law under low-frequency fluctuation in unidirectional-ring laser network　　　　　　　　　　　　　　　
  T. Mihana, K. Kanno, A. Uchida, R. Horisaki, and M. Naruse
  Proceedings of the 2023 International Symposium on Nonlinear Theory and Its Applications (NOLTA2023), Sep. 2023, [International conference]
• Experimental investigation on nonlinear dynamics in a multimode semiconductor laser with optical feedback and injection for decision making　　　　　　　　　　　　　　　
  R. Iwami, T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of the 2023 International Symposium on Nonlinear Theory and Its Applications (NOLTA2023), Sep. 2023, [International conference]
• Experiment on decision making using two different dynamics in semiconductor laser network　　　　　　　　　　　　　　　
  K. Sasaki, K. Ishimine, T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of the 2023 International Symposium on Nonlinear Theory and Its Applications (NOLTA2023), Sep. 2023, [International conference]
• Experimental investigation of reinforcement learning using optical spatiotemporal dynamics　　　　　　　　　　　　　　　
  K. Takehana, H. Takizawa, K. Kanno, and A. Uchida
  Proceedings of the 2023 International Symposium on Nonlinear Theory and Its Applications (NOLTA2023), Sep. 2023, [International conference]
• Replication of laser dynamics using reservoir computing　　　　　　　　　　　　　　　
  A. Kawakami, K. Kanno, and A. Uchida
  Proceedings of the 2023 International Symposium on Nonlinear Theory and Its Applications (NOLTA2023), Sep. 2023, [International conference]
• Time series prediction of intermittent laser dynamics using reservoir computing　　　　　　　　　　　　　　　
  S. Ohara, K. Kanno, A. Uchida, and H. Kurokawa
  Proceedings of the 2023 International Symposium on Nonlinear Theory and Its Applications (NOLTA2023), Sep. 2023, [International conference]
• Approximate reservoir computing using semiconductor lasers with optical feedback　　　　　　　　　　　　　　　
  T. Ito, K. Kanno, and A. Uchida
  Proceedings of the 2023 International Symposium on Nonlinear Theory and Its Applications (NOLTA2023), Sep. 2023, [International conference]
• Optoelectronic implementation of physical deep learning based on optimal control　　　　　　　　　　　　　　　
  R. Nogami, K. Kanno, T. Niiyama, S. Sunada, and A. Uchida
  Proceedings of the 2023 International Symposium on Nonlinear Theory and Its Applications (NOLTA2023), Sep. 2023, [International conference]
• Experimental verification of universal single-mode lasing in fully chaotic billiard lasers　　　　　　　　　　　　　　　
  M. You, K. Makino, Y. Morishita, K. Kanno, A. Uchida, S. Sunada, S. Shinohara, and T. Harayama
  Proceedings of the 2023 International Symposium on Nonlinear Theory and Its Applications (NOLTA2023), Sep. 2023, [International conference]
• 半導体レーザカオスの複素電界ダイナミックスの帯域拡大と乱数生成実験　　　　　　　　　　　　　　　
  鶴見 結稀, 工藤 翔大, 巳鼻 孝朋, 菅野 円隆, 内田 淳史
  Sep. 2023, [Domestic conference]
• マルチモード半導体レーザのカオス的モード競合の光注入制御実験と意思決定　　　　　　　　　　　　　　　
  岩見 龍吾, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2023, [Domestic conference]
• ４台の半導体レーザネットワークでの低周波不規則振動を用いた意思決定実験　　　　　　　　　　　　　　　
  石嶺 好太, 佐々木 圭悟, 菅野 円隆, 内田 淳史
  Sep. 2023, [Domestic conference]
• レーザネットワークにおける先行振動持続時間のべき乗則　　　　　　　　　　　　　　　
  巳鼻 孝朋, レーム アンドレ, 堀﨑 遼一, 菅野 円隆, 内田 淳史, 成瀬 誠
  Sep. 2023, [Domestic conference]
• リザーバコンピューティングを用いた半導体レーザのダイナミクスの複製　　　　　　　　　　　　　　　
  川上 敦也, 菅野 円隆, 内田 淳史
  Sep. 2023, [Domestic conference]
• ダイレクトフィードバックアライメントを用いた最適制御に基づく物理深層学習の実験実装　　　　　　　　　　　　　　　
  野上 倫, 菅野 円隆, 新山 友暁, 砂田 哲, 内田 淳史
  Sep. 2023, [Domestic conference]
• 戻り光を有する半導体レーザーを用いた近似リザーバコンピューティングの性能評価　　　　　　　　　　　　　　　
  伊藤 立希, 菅野 円隆, 内田 淳史
  Sep. 2023, [Domestic conference]
• 空間的な結合を加えた時空間ダイナミクスを用いた意思決定実験　　　　　　　　　　　　　　　
  武塙 賢人, 瀧澤颯斗, 菅野 円隆, 内田 淳史
  Sep. 2023, [Domestic conference]
• 異なるダイナミクスを用いた一方向結合された半導体レーザネットワークにおける意思決定実験　　　　　　　　　　　　　　　
  佐々木 圭悟, 石嶺 好太, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2023, [Domestic conference]
• Reinforcement learning using optical spatiotemporal dynamics from spatial light modulator　　　　　　　　　　　　　　　
  K. Morijiri, K. Takehana, K. Kanno, and A. Uchida
  Sep. 2023, [International conference]
• Replication of optical chaotic dynamics using reservoir computing　　　　　　　　　　　　　　　
  A. Kawakami, K. Kanno, and A. Uchida
  Sep. 2023, [International conference]
• An approach to output layer optimization in photonic delay-based reservoir computing　　　　　　　　　　　　　　　
  F. Koester, K. Kanno, and A. Uchida
  Sep. 2023, [International conference]
• Experimental investigation on dynamics among longitudinal modes in a multimode semiconductor laser　　　　　　　　　　　　　　　
  R. Iwami, K. Kanno, and A. Uchida
  Sep. 2023, [International conference]
• Photonic decision making using optical spatiotemporal chaos generated from spatial light modulator　　　　　　　　　　　　　　　
  A. Uchida, K. Morijiri, K. Takehana, and K. Kanno
  Aug. 2023, [International conference]
• Assessment of the feasibility of employing chaos synchronization in two cascaded microresonators for secure data transmission　　　　　　　　　　　　　　　
  D. Lemcke, D. Moreno, S. Fujii, A. Nakashima, A. Uchida, and T. Tanabe
  Jun. 2023, [International conference]
• 複雑系フォトニクスを用いた光リザーバーコンピューティングと光意思決定　　　　　　　　　　　　　　　
  内田 淳史
  May 2023, [Domestic conference]
• Evaluation of chaos synchronization in two cascaded microresonators for secure data transmission　　　　　　　　　　　　　　　
  D. Lemcke, D. Moreno, S. Fujii, A. Nakashima, A. Uchida, and T. Tanabe
  Apr. 2023, [International conference]
• 動的システムの最適制御に基づく物理コンピューティング　　　　　　　　　　　　　　　
  新山 友暁, 砂田 哲, レーム アンドレ, 菅野 円隆, 内田 淳史
  Mar. 2023, [Domestic conference]
• 光リザーバコンピューティングと光強化学習の最新研究動向　　　　　　　　　　　　　　　
  内田 淳史
  Mar. 2023, [Domestic conference]
• 戻り光を有する半導体レーザカオスにおけるリアプノフベクトルの観測　　　　　　　　　　　　　　　
  井上 聡太, 菅野 円隆, 内田 淳史
  Mar. 2023, [Domestic conference]
• 光リザーバコンピューティングにおける転移学習を用いたレーザのダイナミクスの推測　　　　　　　　　　　　　　　
  酒巻 里衣, 菅野 円隆, 犬伏 正信, 内田 淳史
  Mar. 2023, [Domestic conference]
• 多モード半導体レーザにおけるカオス的遍歴を用いた意思決定実験　　　　　　　　　　　　　　　
  岩見 龍吾, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Mar. 2023, [Domestic conference]
• 複雑系フォトニクスを活用する光リザーバコンピューティングと意思決定　　　　　　　　　　　　　　　
  内田 淳史
  Mar. 2023, [Domestic conference]
• レーザネットワークによる瞬時情報処理担体の構築と応用　　　　　　　　　　　　　　　
  巳鼻 孝朋, Andre Roehm, 菅野 円隆, 内田 淳史, 堀﨑 遼一, 成瀬 誠
  Mar. 2023, [Domestic conference]
• Artificial intelligence using complex photonics: Decision making and reservoir computing　　　　　　　　　　　　　　　
  A. Uchida
  Mar. 2023, [International conference]
• Synchronization of microresonator frequency combs in chaotic regime　　　　　　　　　　　　　　　
  D. Moreno, S. Fujii, A. Nakashima, A. Uchida, P. Sanchis, and T. Tanabe
  Proceedings of SPIE Photonics West 2023, Feb. 2023, [International conference]
• 光コヒーレント検波を用いた半導体レーザにおける複素電界のカオス振動抽出と高速物理乱数生成　　　　　　　　　　　　　　　
  工藤 翔大, 菅野 円隆, 内田 淳史
  Jan. 2023, [Domestic conference]
• Photonic reservoir computing for prediction and replication of chaotic dynamical systems　　　　　　　　　　　　　　　
  A. Kawakami, K. Kanno, A. Uchida
  Proceedings of 2022 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2022), Dec. 2022, [International conference]
• Transfer learning based on photonic reservoir computing using semiconductor laser with optical feedback　　　　　　　　　　　　　　　
  R. Sakamaki, K. Kanno, M. Inubushi, A. Uchida
  Proceedings of 2022 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2022), Dec. 2022, [International conference]
• Control of intermittent chaos in semiconductor laser with short external cavity　　　　　　　　　　　　　　　
  S. Inoue, K. Kanno, A. Uchida
  Proceedings of 2022 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2022), Dec. 2022, [International conference]
• Experimental demonstration of physical deep learning based on optimal control using optoelectronic delay system　　　　　　　　　　　　　　　
  R. Nogami, K. Kanno, S. Sunada, A. Uchida
  Proceedings of 2022 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2022), Dec. 2022, [International conference]
• Experiment on random number generation with chaotic dynamics of complex electric-field amplitude in semiconductor laser　　　　　　　　　　　　　　　
  S. Kudo, S. Numata, K. Kanno, A. Uchida
  Proceedings of 2022 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2022), Dec. 2022, [International conference]
• Decision making for multi-armed bandit problem using two different dynamics in laser network　　　　　　　　　　　　　　　
  K. Sasaki, T. Mihana, K. Kanno, M. Naruse, A. Uchida
  Proceedings of 2022 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2022), Dec. 2022, [International conference]
• Experiment on decision making using chaotic multi-mode semiconductor laser with optical feedback and injection　　　　　　　　　　　　　　　
  R. Iwami, T. Mihana, K. Kanno, M. Naruse, A. Uchida
  Proceedings of 2022 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2022), Dec. 2022, [International conference]
• Experiment on spatiotemporal dynamics generation and parallel decision making using spatial light modulator and semiconductor laser　　　　　　　　　　　　　　　
  K. Takehana, K. Morijiri, T. Mihana, K. Kanno, M. Naruse, A. Uchida
  Proceedings of 2022 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2022), Dec. 2022, [International conference]
• 電気光遅延システムを用いた最適制御に基づく物理深層学習の実証実験　　　　　　　　　　　　　　　
  野上 倫, 菅野 円隆, 砂田 哲, 内田 淳史
  Nov. 2022, [Domestic conference]
• 光リザーバコンピューティングを用いたカオスダイナミクスの予測と複製　　　　　　　　　　　　　　　
  川上 敦也, 菅野 円隆, 内田 淳史
  Nov. 2022, [Domestic conference]
• 半導体レーザネットワークにおける低周波不規則振動とカオスを用いた意思決定実験　　　　　　　　　　　　　　　
  佐々木 圭悟, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Nov. 2022, [Domestic conference]
• 半導体レーザと空間光変調器で生成された時空間ダイナミクスを用いた意思決定の並列実装　　　　　　　　　　　　　　　
  武塙 賢人, 森尻 健正, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Nov. 2022, [Domestic conference]
• 光リザーバコンピューティングと光強化学習の最前線　　　　　　　　　　　　　　　
  内田 淳史
  Nov. 2022, [Domestic conference]
• 瞬時情報処理担体としてのレーザネットワークとそのコンピューティング応用　　　　　　　　　　　　　　　
  巳鼻 孝朋, レーム アンドレ, 堀﨑 遼一, 菅野 円隆, 内田 淳史, 成瀬 誠
  Nov. 2022, [Domestic conference]
• 半導体レーザのリザーバコンピューティングを用いた非線形ダイナミクスの複製　　　　　　　　　　　　　　　
  川上 敦也, 菅野 円隆, 内田 淳史
  Sep. 2022, [Domestic conference]
• 最適制御に基づく物理深層学習の電気光遅延システムによる実験実装　　　　　　　　　　　　　　　
  野上 倫, 菅野 円隆, 砂田 哲, 内田 淳史
  Sep. 2022, [Domestic conference]
• 戻り光を有する半導体レーザを用いた光リザーバコンピューティングによる転移学習　　　　　　　　　　　　　　　
  酒巻 里衣, 菅野 円隆, 犬伏 正信, 内田 淳史
  Sep. 2022, [Domestic conference]
• 戻り光を有する半導体レーザにおける間欠性カオスの予測と予防　　　　　　　　　　　　　　　
  井上 聡太, 菅野 円隆, 内田 淳史
  Sep. 2022, [Domestic conference]
• 戻り光を有する半導体レーザのカオス的複素電界振動を用いた乱数生成実験　　　　　　　　　　　　　　　
  工藤 翔大, 沼田 新, 菅野 円隆, 内田 淳史
  Sep. 2022, [Domestic conference]
• レーザネットワークのゼロ遅延同期を用いた協調的意思決定メカニズム　　　　　　　　　　　　　　　
  神徳 駿, 巳鼻 孝朋, Roehm Andre, 堀﨑 遼一, 菅野 円隆, 内田 淳史, 成瀬 誠
  Sep. 2022, [Domestic conference]
• マルチモード半導体レーザのカオス的モード競合の制御を用いた意思決定実験　　　　　　　　　　　　　　　
  岩見 龍吾, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2022, [Domestic conference]
• ２つの異なるダイナミクスを用いたレーザネットワークにおける意思決定実験　　　　　　　　　　　　　　　
  佐々木 圭悟, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2022, [Domestic conference]
• 空間光変調器を用いた時空間ダイナミクスによる並列意思決定実験　　　　　　　　　　　　　　　
  武塙 賢人, 森尻 健正, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2022, [Domestic conference]
• Photonic artificial intelligence based on complex photonics: Reservoir computing and decision making　　　　　　　　　　　　　　　
  A. Uchida
  Sep. 2022, [International conference]
• Prediction and replication of chaotic dynamics using photonic reservoir computing with semiconductor laser　　　　　　　　　　　　　　　
  A. Kawakami, K. Kanno, A. Uchida
  Aug. 2022, [International conference]
• Experiment on decision making for multi-armed bandit problem using chaos and low frequency fluctuations in laser network　　　　　　　　　　　　　　　
  K. Sasaki, T. Mihana, K. Kanno, M. Naruse, A. Uchida
  Aug. 2022, [International conference]
• Application for decision making by controlling chaotic mode competition dynamics in multi-mode semiconductor laser　　　　　　　　　　　　　　　
  R. Iwami, T. Mihana, K. Kanno, M. Naruse, A. Uchida
  Aug. 2022, [International conference]
• Experiment on extraction of complex electric-field amplitude in chaotic semiconductor laser for random number generation　　　　　　　　　　　　　　　
  S. Kudo, S. Numata, K. Kanno, A. Uchida
  Aug. 2022, [International conference]
• Prevention of intermittent chaos in semiconductor laser with optical feedback　　　　　　　　　　　　　　　
  S. Inoue, K. Kanno, A. Uchida
  Aug. 2022, [International conference]
• High optical feedback resistance of 1.55 um 15-layer-stacked quantum dot laser using InP(311)B substrate　　　　　　　　　　　　　　　
  A. Matsumoto, K. Akahane, T. Umezawa, N. Yamamoto, K. Kanno, M. Naruse, A. Uchida, and A. Kanno
  Aug. 2022, [International conference]
• Photonic decision making for solving bandit problem using laser network　　　　　　　　　　　　　　　
  T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Jul. 2022, [International conference]
• Photonic decision making by chaotic mode dynamics in multi-mode semiconductor laser with optical feedback　　　　　　　　　　　　　　　
  R. Iwami, T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Jul. 2022, [International conference]
• Photonic approach to reinforcement learning　　　　　　　　　　　　　　　
  M. Naruse, A. Uchida, K. Uchiyama, and K. Akahane
  Jul. 2022, [International conference]
• 160 Gb/s true physical random bit generation using broad-band, high-entropy semiconductor laser chaos　　　　　　　　　　　　　　　
  C.-H. Tseng, R. Funabashi, K. Kanno, A. Uchida, C.-C. Wei, and S.-K. Hwang
  May 2022, [International conference]
• 間光ダイナミクスを用いた意思決定実験　　　　　　　　　　　　　　　
  森尻 健正, 武塙 賢人, 菅野 円隆, 成瀬 誠, 内田 淳史
  Mar. 2022, [Domestic conference]
• 戻り光を有する半導体レーザカオスのサンプルエントロピー評価と物理乱数生成　　　　　　　　　　　　　　　
  大熊 智彦, 澤山 太一, 菅野 円隆, 内田 淳史
  Mar. 2022, [Domestic conference]
• アラン分散による低周波不規則振動の時間構造の分析　　　　　　　　　　　　　　　
  足助 尚樹, ショヴェ 二コラ, レーム アンドレ, 菅野 円隆, 内田 淳史, 堀﨑 遼一, 成瀬 誠
  Mar. 2022, [Domestic conference]
• 多モード半導体レーザを用いた意思決定におけるモード制御実験　　　　　　　　　　　　　　　
  岩見 龍吾, 藤島 千凡, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Mar. 2022, [Domestic conference]
• 半導体レーザネットワークを用いた多腕バンディット問題における意思決定　　　　　　　　　　　　　　　
  巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Mar. 2022, [Domestic conference]
• Photonic accelerator based on optical chaos　　　　　　　　　　　　　　　
  A. Uchida
  Proceedings of SPIE, Feb. 2022, [International conference]
• Scalable neuro-inspired photonic computing on a silicon chip　　　　　　　　　　　　　　　
  S. Sunada and A. Uchida
  Feb. 2022, [International conference]
• 多腕バンディット問題に対する生物種間競争ダイナミクスを利用した強化学習法　　　　　　　　　　　　　　　
  新山 友暁, 古畑 玄貴, 内田 淳史, 成瀬 誠, 砂田 哲
  Jan. 2022, [Domestic conference]
• 複雑光ダイナミクスに基づく機械学習手法の発　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史
  Jan. 2022, [Domestic conference]
• 複雑光ダイナミクスによるリザーバコンピューティングと強化学習の融合　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史
  Jan. 2022, [Domestic conference]
• 半導体レーザーのカオス的モード競合の制御を用いた光意思決定　　　　　　　　　　　　　　　
  岩見 龍吾, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Jan. 2022, [Domestic conference]
• 160 Gb/s true physical random bit generation using broad-band, high-entropy semiconductor laser chaos　　　　　　　　　　　　　　　
  C.-H. Tseng, R. Funabashi, K. Kanno, A. Uchida, C.-C. Wei, and S.-K. Hwang
  Dec. 2021, [International conference]
• 光を用いた強化学習の研究　　　　　　　　　　　　　　　
  成瀬 誠, 内田 淳史, 内山 和治, 赤羽 浩一
  Nov. 2021, [Domestic conference]
• 光リザーバコンピューティングと光意思決定の新展開　　　　　　　　　　　　　　　
  内田 淳史
  Nov. 2021, [Domestic conference]
• Analysis of the temporal structure of laser chaos by Allan variance　　　　　　　　　　　　　　　
  N. Asuke, N. Chauvet, A. Roehm, K. Kanno, A. Uchida, R. Horisaki, and M. Naruse
  Proceedings of International Symposium on Physics and Applications of Laser Dynamics 2021 (IS-PALD 2021), Nov. 2021, [International conference]
• Random number generation using complex electric-field dynamics in a chaotic semiconductor laser by coherent detection　　　　　　　　　　　　　　　
  S. Kudo, R. Funabashi, K. Kanno, and A. Uchida
  Proceedings of International Symposium on Physics and Applications of Laser Dynamics 2021 (IS-PALD 2021), Nov. 2021, [International conference]
• Parallel bandit architecture for reinforcement learning using chaotic laser time series　　　　　　　　　　　　　　　
  T. Urushibara, N. Chauvet, A. Roehm, S. Kochi, S. Sunada, K. Kanno, A. Uchida, R. Horisaki, and M. Naruse
  Proceedings of International Symposium on Physics and Applications of Laser Dynamics 2021 (IS-PALD 2021), Nov. 2021, [International conference]
• Reinforcement learning by photonics　　　　　　　　　　　　　　　
  M. Naruse, A. Uchida, K. Uchiyama, and K. Akahane
  Proceedings of International Symposium on Physics and Applications of Laser Dynamics 2021 (IS-PALD 2021), Nov. 2021, [International conference]
• Decision making in the multi-armed bandit problem using chaotic temporal waveforms　　　　　　　　　　　　　　　
  K. Morijiri, T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of International Symposium on Physics and Applications of Laser Dynamics 2021 (IS-PALD 2021), Nov. 2021, [International conference]
• Photonic decision making for competitive multi-armed bandit problem using synchronized laser network　　　　　　　　　　　　　　　
  T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of International Symposium on Physics and Applications of Laser Dynamics 2021 (IS-PALD 2021), Nov. 2021, [International conference]
• Entropy estimation in chaotic semiconductor lasers with time-delayed optical feedback for random number generation　　　　　　　　　　　　　　　
  T. Okuma, K. Kanno, and A. Uchida
  Proceedings of International Symposium on Physics and Applications of Laser Dynamics 2021 (IS-PALD 2021), Nov. 2021, [International conference]
• Photonic decision making using chaotic dynamics in a multi-mode semiconductor laser with optical feedback　　　　　　　　　　　　　　　
  R. Iwami, T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of International Symposium on Physics and Applications of Laser Dynamics 2021 (IS-PALD 2021), Nov. 2021, [International conference]
• Prediction of intermittent chaos in a semiconductor laser with short external cavity　　　　　　　　　　　　　　　
  S. Inoue, T. Mihana, S. Ohara, K. Kanno, and A. Uchida
  Proceedings of International Symposium on Physics and Applications of Laser Dynamics 2021 (IS-PALD 2021), Nov. 2021, [International conference]
• 戻り光半導体レーザで生じる間欠性カオスの制御　　　　　　　　　　　　　　　
  井上 聡太, 巳鼻 孝朋, 小原 翔馬, 菅野 円隆, 内田 淳史
  Oct. 2021, [Domestic conference]
• 半導体レーザネットワークの遅延カオス同期を用いた競合的意思決定　　　　　　　　　　　　　　　
  巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Oct. 2021, [Domestic conference]
• 半導体レーザカオスにおける複素電界ダイナミクスの光コヒーレント検波による実験的抽出　　　　　　　　　　　　　　　
  工藤 翔大, 舟橋 遼, 菅野 円隆, 内田 淳史
  Oct. 2021, [Domestic conference]
• 電気光遅延リザーバコンピューティングにおけるランダムバイアス信号を用いた性能向上　　　　　　　　　　　　　　　
  土田 朝陽, 斎藤 健斗, 菅野 円隆, 内田 淳史
  Sep. 2021, [Domestic conference]
• フォトニック強化学習における時間割引の解析　　　　　　　　　　　　　　　
  白鳥 帆香, 漆原 昂, ショヴェ 二コラ, 砂田 哲, 菅野 円隆, 内田 淳史, 堀崎 遼一, 成瀬 誠
  Sep. 2021, [Domestic conference]
• レーザネットワークの同期現象を用いた競合バンディット問題における意思決定　　　　　　　　　　　　　　　
  巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2021, [Domestic conference]
• 複数の半導体レーザカオス波形比較による意思決定手法の性能調査　　　　　　　　　　　　　　　
  森尻 健正, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2021, [Domestic conference]
• 戻り光を有するマルチモード半導体レーザのカオスダイナミクスを用いた意思決定における選択特徴の調査　　　　　　　　　　　　　　　
  岩見 龍吾, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2021, [Domestic conference]
• 短い外部共振器を有する半導体レーザにおける間欠性カオスの検知と予測　　　　　　　　　　　　　　　
  井上 聡太, 巳鼻 孝朋, 小原 翔馬, 菅野 円隆, 内田 淳史
  Sep. 2021, [Domestic conference]
• 戻り光を有する半導体レーザカオス時系列のサンプルエントロピー評価による複雑性評価　　　　　　　　　　　　　　　
  大熊 智彦, 菅野 円隆, 内田 淳史
  Sep. 2021, [Domestic conference]
• 光コヒーレント検波による半導体レーザカオスの複素電界ダイナミクスを用いた乱数生成　　　　　　　　　　　　　　　
  工藤 翔大, 舟橋 遼, 菅野 円隆, 内田 淳史
  Sep. 2021, [Domestic conference]
• アラン分散によるレーザーカオスの時間構造の分析　　　　　　　　　　　　　　　
  足助 尚樹, Chauvet Nicolas, Roehm Andre, 菅野 円隆, 内田 淳史, 堀崎 遼一, 成瀬 誠
  Sep. 2021, [Domestic conference]
• 複雑系フォトニクスを用いた光リザーバコンピューティ ングと光意思決定　　　　　　　　　　　　　　　
  内田 淳史, 菅野 円隆
  Sep. 2021, [Domestic conference]
• Decision making based on mode competition dynamics in a multimode semiconductor laser with optical feedback　　　　　　　　　　　　　　　
  R. Iwami, T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Aug. 2021, [International conference]
• 光リザーバコンピューティングの実装と強化学習への応用　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史
  Jul. 2021, [Domestic conference]
• Photonic artificial intelligence using complex photonics: Reservoir computing and decision making　　　　　　　　　　　　　　　
  A. Uchida
  Jul. 2021, [International conference]
• フォトニックQ学習における状態探索の解析　　　　　　　　　　　　　　　
  漆原 昂, ショヴェ 二コラ, 砂田 哲, 菅野 円隆, 内田 淳史, 堀崎 遼一, 成瀬 誠
  Mar. 2021, [Domestic conference]
• 電気光遅延リザーバコンピューティングにおける遅延ループ数による記憶容量と非線形性のトレードオフ　　　　　　　　　　　　　　　
  齊藤 健斗, 菅野 円隆, 内田 淳史
  Mar. 2021, [Domestic conference]
• 生物種間競争原理を利用したMAB型強化学習問題の最適解探索法　　　　　　　　　　　　　　　
  新山 友暁, 古畑 玄貴, 内田 淳史, 成瀬 誠, 砂田 哲
  Mar. 2021, [Domestic conference]
• 戻り光を有する半導体レーザを用いた光ディープリザーバコンピューティングにおける層数と性能の関係調査　　　　　　　　　　　　　　　
  長谷川 寛, 菅野 円隆, 内田 淳史
  Mar. 2021, [Domestic conference]
• マルチモード半導体レーザのモード競合ダイナミクスを用いた意思決定における台数拡張性の調査　　　　　　　　　　　　　　　
  岩見 龍吾, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Mar. 2021, [Domestic conference]
• 3つの半導体レーザにおける遅延カオス同期を用いた意思決定実験　　　　　　　　　　　　　　　
  高林 瑞穂, 廣田 和幹, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Mar. 2021, [Domestic conference]
• 電気光遅延リザーバコンピューティングにおける強化学習を用いたモデル選択実験　　　　　　　　　　　　　　　
  水戸 遼平, 菅野 円隆, 成瀬 誠, 内田 淳史
  Mar. 2021, [Domestic conference]
• 戻り光を有する半導体レーザにおける位相ダイナミクスと高速物理乱数生成　　　　　　　　　　　　　　　
  舟橋 遼, 工藤 翔太, 菅野 円隆, 内田 淳史
  Mar. 2021, [Domestic conference]
• クロージング：フォトニクスとコンピューティングの先端動向　　　　　　　　　　　　　　　
  内田 淳史
  Mar. 2021, [Domestic conference]
• 複雑系フォトニクスを用いた光リザーバコンピューティングと意思決定　　　　　　　　　　　　　　　
  内田 淳史
  Mar. 2021, [Domestic conference]
• 半導体レーザーネットワークを用いた競合バンディット問題における意思決定　　　　　　　　　　　　　　　
  巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  レーザー学会 第550回研究会「レーザーのカオス・ノイズダイナミクスとその応用」, Feb. 2021, [Domestic conference]
• カオス発振するマルチモード半導体レーザーのダイナミクスと多腕バンディット問題への応用におけるスケーラビリティの調査　　　　　　　　　　　　　　　
  岩見 龍吾, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  レーザー学会 第550回研究会「レーザーのカオス・ノイズダイナミクスとその応用」, Feb. 2021, [Domestic conference]
• 半導体レーザーを用いた一方向結合リング状ネットワークによる意思決定　　　　　　　　　　　　　　　
  巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Jan. 2021, [Domestic conference]
• 半導体レーザーのリザーバコンピューティングを用いた強化学習の提案　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史
  Jan. 2021, [Domestic conference]
• 複雑系フォトニクスを用いた光人工知能：リザーバコンピューティングと意思決定への応用　　　　　　　　　　　　　　　
  内田 淳史, 菅野 円隆
  Dec. 2020, [Domestic conference]
• Photonic reservoir computing using complex laser dynamics　　　　　　　　　　　　　　　
  A. Uchida and K. Kanno
  Nov. 2020, [International conference]
• Mode competition dynamics and decision making using a chaotic multimode semiconductor laser　　　　　　　　　　　　　　　
  R. Iwami, T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of 2020 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2020), Nov. 2020, [International conference]
• Decision making using comparison of chaotic temporal waveforms in semiconductor lasers　　　　　　　　　　　　　　　
  K. Morijiri, T. Mihana, A. Oda, R. Iwami, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of 2020 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2020), Nov. 2020, [International conference]
• Experiment on spontaneous switching of leader-laggard relationship in coupled three semiconductor lasers for decision making　　　　　　　　　　　　　　　
  M. Takabayashi, T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of 2020 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2020), Nov. 2020, [International conference]
• Decision making for solving competitive multi-armed bandit problem using scalable laser network　　　　　　　　　　　　　　　
  T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of 2020 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2020), Nov. 2020, [International conference]
• Memory capacity and nonlinearity in electro-optic delay-based reservoir computing　　　　　　　　　　　　　　　
  K. Saito, K. Kanno, and A. Uchida
  Proceedings of 2020 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2020), Nov. 2020, [International conference]
• Architectures of photonic deep reservoir computing using a semiconductor laser with optical feedback and injection　　　　　　　　　　　　　　　
  H. Hasegawa, K. Kanno, and A. Uchida
  Proceedings of 2020 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2020), Nov. 2020, [International conference]
• Experiment on adaptive model selection using reinforcement learning in electrooptic delay-based reservoir computing　　　　　　　　　　　　　　　
  R. Mito, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of 2020 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2020), Nov. 2020, [International conference]
• Reinforcement learning based on electro-optic delay-based reservoir computing　　　　　　　　　　　　　　　
  K. Kanno and A. Uchida
  Proceedings of 2020 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2020), Nov. 2020, [International conference]
• Evaluation of optical frequency dynamics in a semiconductor laser with timedelayed optical feedback　　　　　　　　　　　　　　　
  R. Funabashi, K. Kanno, and A. Uchida
  Proceedings of 2020 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2020), Nov. 2020, [International conference]
• Comparison between (epsilon, tau) entropy and sample entropy in a chaotic semiconductor laser　　　　　　　　　　　　　　　
  T. Okuma, Y. Kawaguchi, K. Kanno, and A. Uchida
  Proceedings of 2020 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2020), Nov. 2020, [International conference]
• Reservoir computing with laser dynamics: Applications of photonic artificial intelligenc　　　　　　　　　　　　　　　
  A. Uchida and K. Kanno
  Nov. 2020, [International conference]
• 複数の半導体レーザカオス波形を用いたスケーラブルな意思決定　　　　　　　　　　　　　　　
  森尻 健正, 巳鼻 孝朋, 小田 章裕, 岩見 龍吾, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2020, [Domestic conference]
• 時間遅延リザーバコンピューティングを用いた強化学習　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史
  Sep. 2020, [Domestic conference]
• レーザネットワークの遅延カオス同期を用いた意思決定　　　　　　　　　　　　　　　
  巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2020, [Domestic conference]
• 一方向結合された３つの半導体レーザにおける遅延カオス同期実験　　　　　　　　　　　　　　　
  高林 瑞穂, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2020, [Domestic conference]
• マルチモード半導体レーザのモード競合ダイナミクスを用いた意思決定性能の調査　　　　　　　　　　　　　　　
  岩見 龍吾, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2020, [Domestic conference]
• 戻り光を有する半導体レーザにおける周波数ダイナミクスの抽出　　　　　　　　　　　　　　　
  舟橋 遼, 菅野 円隆, 内田 淳史
  Sep. 2020, [Domestic conference]
• 光注入された半導体レーザカオスおけるサンプルエントロピーと (ε,τ) エントロピーの比較　　　　　　　　　　　　　　　
  大熊 智彦, 川口 佑, 菅野 円隆, 内田 淳史
  Sep. 2020, [Domestic conference]
• 電気光遅延システムのリザーバコンピューティングにおける強化学習を用いたモデル選択の実験的評価　　　　　　　　　　　　　　　
  水戸 遼平, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2020, [Domestic conference]
• レーザーカオス時系列を用いたQ学習の提案と実証　　　　　　　　　　　　　　　
  漆原 昂, ショヴェ 二コラ, 河内 聡志, 砂田 哲, 菅野 円隆, 内田 淳史, 成瀬 誠
  Sep. 2020, [Domestic conference]
• 電気光遅延システムを用いたリザーバコンピューティングにおける非線形性と記憶容量の調査　　　　　　　　　　　　　　　
  齊藤 健斗, 菅野 円隆, 内田 淳史
  Sep. 2020, [Domestic conference]
• 光の時空間ダイナミクスに基づく並列コンピューティング　　　　　　　　　　　　　　　
  砂田 哲, 菅野 円隆, 内田 淳史
  Sep. 2020, [Domestic conference]
• 遅延フィードバックを有する半導体レーザを用いたディープリザーバコンピューティングの構成方法の比較　　　　　　　　　　　　　　　
  長谷川 寛, 菅野 円隆, 内田 淳史
  Sep. 2020, [Domestic conference]
• Photonic accelerator: reservoir computing and decision making for artificial intelligence　　　　　　　　　　　　　　　
  A. Uchida, K. Kanno, S. Sunada, and M. Naruse
  Jul. 2020, [International conference]
• 戻り光を付加された量子ドットレーザのダイナミクス実験　　　　　　　　　　　　　　　
  山崎 和人, 菅野 円隆, 松本 敦, 成瀬 誠, 山本 直克, 内田 淳史
  Mar. 2020, [Domestic conference]
• 多本腕バンディット問題における最良選択に対する複雑ダイナミクスの効果　　　　　　　　　　　　　　　
  河内 聡志, 新山 友暁, 内田 淳史, 成瀬 誠, 砂田 哲
  Mar. 2020, [Domestic conference]
• 綱引き理論に基づく半導体レーザネットワークを用いた意思決定　　　　　　　　　　　　　　　
  巳鼻 孝朋, 藤井 聖広, 菅野 円隆, 成瀬 誠, 内田 淳史
  Mar. 2020, [Domestic conference]
• 非定常な報酬確率のバンディット問題における半導体レーザカオスを用いた意思決定　　　　　　　　　　　　　　　
  小田 章裕, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Mar. 2020, [Domestic conference]
• 物理乱数源としての半導体レーザカオス時系列のエントロピー評価実験　　　　　　　　　　　　　　　
  川口 佑, 菅野 円隆, 内田 淳史
  Mar. 2020, [Domestic conference]
• 戻り光変調された半導体レーザを用いた光リザーバコンピューティングの性能評価実験　　　　　　　　　　　　　　　
  アフィカ アマリナ ハヤ, 菅野 円隆, 内田 淳史
  Mar. 2020, [Domestic conference]
• 複雑系フォトニクスに基づく光AI: 光リザーバーコンピューティングの進展　　　　　　　　　　　　　　　
  内田 淳史, 菅野 円隆
  Mar. 2020, [Domestic conference]
• 戻り光を有するマルチモード半導体レーザーにおけるモード競合ダイナミクスと意思決定への応用　　　　　　　　　　　　　　　
  岩見 龍吾, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Feb. 2020, [Domestic conference]
• 一方向リングレーザーネットワークにおける遅延カオス同期と意思決定　　　　　　　　　　　　　　　
  巳鼻 孝朋, 藤井 聖広, 菅野 円隆, 成瀬 誠, 内田 淳史
  Feb. 2020, [Domestic conference]
• Decision making using classical and quantum light　　　　　　　　　　　　　　　
  M. Naruse, N. Chauvet, S.Huant, S. Sunada, A. Uchida, and H. Hori
  Feb. 2020, [International conference]
• 半導体レーザを用いたリザーバーコンピューティング　　　　　　　　　　　　　　　
  内田 淳史, 菅野 円隆
  Jan. 2020, [Domestic conference]
• Evaluation of entropy rate from chaotic time series in semiconductor lasers　　　　　　　　　　　　　　　
  Y. Kawaguchi, K. Kanno, and A. Uchida
  Proceedings of 2019 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2019), Dec. 2019, [International conference]
• Extraction of optical frequency dynamics in a semiconductor laser with optical delayed feedback　　　　　　　　　　　　　　　
  R. Funabashi, K. Kanno, and A. Uchida
  Proceedings of 2019 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2019), Dec. 2019, [International conference]
• Optimal complex dynamics for solving multi-armed bandit problems using chaotic time series　　　　　　　　　　　　　　　
  S. Kochi, T. Niiyama, A. Uchida, M. Naruse, and S. Sunada
  Proceedings of 2019 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2019), Dec. 2019, [International conference]
• Experiment on decision making using lag synchronization of chaos in mutually-coupled semiconductor lasers with time delay　　　　　　　　　　　　　　　
  M. Takabayashi, Y. Mitsui, T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of 2019 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2019), Dec. 2019, [International conference]
• Decision making for multi-armed bandit problem with variable hit probabilities using chaotic laser signals　　　　　　　　　　　　　　　
  A. Oda, T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of 2019 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2019), Dec. 2019, [International conference]
• Laser network for lag synchronization of chaos and decision making　　　　　　　　　　　　　　　
  T. Mihana, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of 2019 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2019), Dec. 2019, [International conference]
• Adaptive selection of dynamical models based on decision making in laser-based reservoir computing　　　　　　　　　　　　　　　
  K. Kanno, M. Naruse, and A. Uchida
  Proceedings of 2019 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2019), Dec. 2019, [International conference]
• Characteristics of optical feedback modulation in delay-based photonic reservoir computing with a semiconductor laser　　　　　　　　　　　　　　　
  A. A. Haya, C. Sugano, K. Kanno, and A. Uchida
  Proceedings of 2019 International Symposium on Nonlinear Theory and Its Applications (NOLTA 2019), Dec. 2019, [International conference]
• 光を用いたリザーバコンピューティング　　　　　　　　　　　　　　　
  内田 淳史, 菅野 円隆
  Nov. 2019, [Domestic conference]
• 量子ドットレーザを用いた戻り光によるカオス生成におけるヒステリシス現象の観測　　　　　　　　　　　　　　　
  松本 敦, 赤羽 浩一, 山崎 和人, 菅野 円隆, 山本 直克, 堀 裕和, 成瀬 誠, 内田 淳史
  Sep. 2019, [Domestic conference]
• 戻り光半導体レーザにおける光ヘテロダイン検波を用いた周波数ダイナミクスの数値計算　　　　　　　　　　　　　　　
  舟橋 遼, 菅野 円隆, 内田 淳史
  Sep. 2019, [Domestic conference]
• マルチモード半導体レーザのモード競合ダイナミクスを用いた多腕バンディット問題における意思決定　　　　　　　　　　　　　　　
  岩見 龍吾, 巳鼻 孝朋, 小田 章裕, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2019, [Domestic conference]
• 動的当たり確率の多腕バンディット問題におけるレーザカオスを用いた意思決定方式の性能向上　　　　　　　　　　　　　　　
  小田 章裕, 巳鼻 孝朋, 岩見 龍吾, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2019, [Domestic conference]
• 遅延フィードバックを有する半導体レーザを用いたリザーバコンピューティングの遅延時間による影響　　　　　　　　　　　　　　　
  長谷川 寛, 菅野 千紘, アフィカ アマリナ ハヤ, 菅野 円隆, 内田 淳史
  Sep. 2019, [Domestic conference]
• 相互結合された半導体レーザの遅延カオス同期を用いた意思決定実験　　　　　　　　　　　　　　　
  高林 瑞穂, 三井 湧方, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2019, [Domestic conference]
• Parallelization in reservoir computing based on a mutually coupled electro-optic delay system　　　　　　　　　　　　　　　
  K. Saito, K. Kanno, and A. Uchida
  Sep. 2019, [International conference]
• Decision making using lag synchronization of chaos in mutually-coupled semiconductor lasers　　　　　　　　　　　　　　　
  T. Mihana, Y. Mitsui, M. Takabayashi, K. Kanno, M. Naruse, and A. Uchida
  Sep. 2019, [International conference]
• Implementation of optical feedback modulation in photonic reservoir computing　　　　　　　　　　　　　　　
  A. A. Haya, C. Sugano, K. Kanno, and A. Uchida
  Sep. 2019, [International conference]
• Experimental investigation of nonlinear dynamics and bifurcation in a quantum-dot laser with optical feedback　　　　　　　　　　　　　　　
  K. Yamasaki, K. Kanno, A. Matsumoto, M. Naruse, N. Yamamoto, and A. Uchida
  Sep. 2019, [International conference]
• 光注入された半導体レーザにおけるカオス時系列の(ε,τ)エントロピー評価　　　　　　　　　　　　　　　
  川口 佑, 菅野 円隆, 内田 淳史
  Sep. 2019, [Domestic conference]
• 複雑系フォトニクスに基づくリザーバコンピューティング応用　　　　　　　　　　　　　　　
  内田 淳史, 菅野 円隆
  Sep. 2019, [Domestic conference]
• Single hybrid plasmonic structures for efficient photon pair production at the nanoscale　　　　　　　　　　　　　　　
  N. Chauvet, M.Corny, G. Laurent, A. Drezet, G. Nogues, G. Dantelle, T.Gacoin, A. Uchida, H. Hori, S. Huant, G. Bachelier, and M. Naruse
  Jul. 2019, [International conference]
• 複雑系フォトニクスを用いたリザーバコンピューティングと高速意思決定　　　　　　　　　　　　　　　
  内田 淳史
  Jul. 2019, [Domestic conference]
• Decision Making by Photons　　　　　　　　　　　　　　　
  M. Naruse, N. Chauvet, A. Uchida, S. Huant, and H. Hori
  Conference Proceedings of the 1st International Conference on Multimedia Information Technology and Applications (MITA2019), Jun. 2019, [International conference]
• 光リザーバコンピューティングの進展とモデル選択応用　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史
  Jun. 2019, [Domestic conference]
• レーザーを用いたリザーバコンピューティングの進展とモデル選択応用　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史
  Jun. 2019, [Domestic conference]
• 相互結合された半導体レーザの遅延カオス同期を用いた意思決定　　　　　　　　　　　　　　　
  三井 湧方, 巳鼻 孝朋, 菅野 円隆, 内田 淳史
  Mar. 2019, [Domestic conference]
• レーザカオス時系列を用いた意思決定原理による無線通信の動的チャネル選択　　　　　　　　　　　　　　　
  竹内 俊剛, 成瀬 誠, 巳鼻 孝朋, 菅野 円隆, 内田 淳史, 馬 セイ, 長谷川 幹雄
  Mar. 2019, [Domestic conference]
• 光微小共振器によるリザバー計算：大規模光ネットワークとセンシング応用　　　　　　　　　　　　　　　
  砂田 哲, 新山 友暁, 内田 淳史, 新井 賢一
  Mar. 2019, [Domestic conference]
• 光リザーバコンピューティングにおける戻り光強度変調と位相変調の比較実　　　　　　　　　　　　　　　
  アフィカ アマリナ ハヤ, 菅野 千紘, 菅野 円隆, 内田 淳史
  Mar. 2019, [Domestic conference]
• 短い遅延ループを有する半導体レーザを用いたリザーバコンピューティングの並列化　　　　　　　　　　　　　　　
  菅野 千紘, アフィカ アマリナ ハヤ, 菅野 円隆, 内田 淳史
  Mar. 2019, [Domestic conference]
• 遅延カオス同期を用いた意思決定の数値計算による性能評価　　　　　　　　　　　　　　　
  巳鼻 孝朋, 三井 湧方, 菅野 円隆, 成瀬 誠, 内田 淳史
  Mar. 2019, [Domestic conference]
• カオス時系列を用いた敵対的生成ネットワーク（CHAOS GAN）　　　　　　　　　　　　　　　
  成瀬 誠, 巳鼻 孝朋, 菅野 円隆, 内田 淳史
  Mar. 2019, [Domestic conference]
• 光リザーバコンピューティングにおける意思決定手法を用いたモデル選択　　　　　　　　　　　　　　　
  菅野 円隆, 成瀬 誠, 内田 淳史
  Mar. 2019, [Domestic conference]
• 当たり確率が変化する多本腕バンディット問題におけるレーザカオスを用いた強化学習と意思決定　　　　　　　　　　　　　　　
  小田 章裕, 巳鼻 孝朋, 菅野 円隆, 成瀬 誠, 内田 淳史
  Mar. 2019, [Domestic conference]
• 複雑系フォトニクスと情報セキュリティ・人工知能への応用　　　　　　　　　　　　　　　
  内田 淳史
  Jan. 2019, [Domestic conference]
• Dynamical channel selection in wireless communications by multi-armed bandit algorithm using chaotic time series　　　　　　　　　　　　　　　
  S. Takeuchi, M. Naruse, T. Mihana, K. Kanno, A. Uchida, J. Ma, and M. Hasegawa
  Jan. 2019, [International conference]
• レーザカオス同期の自発的スイッチング現象を用いた意思決定の数値計算　　　　　　　　　　　　　　　
  巳鼻 孝朋, 三井 湧方, 菅野 円隆, 成瀬 誠, 内田 淳史
  電子情報通信学会 技術研究報告, Jan. 2019, [Domestic conference]
• レーザを用いたリザーバコンピューティングにおける強化学習を利用したモデル選択　　　　　　　　　　　　　　　
  菅野 円隆, 成瀬 誠, 内田 淳史
  電子情報通信学会 技術研究報告, Jan. 2019, [Domestic conference]
• 量子ドットレーザダイナミクスの分岐現象の実験的調査　　　　　　　　　　　　　　　
  山崎 和人, 菅野 円隆, 松本 敦, 成瀬 誠, 山本 直克, 内田 淳史
  電子情報通信学会 技術研究報告, Jan. 2019, [Domestic conference]
• 半導体レーザカオス時系列からのエントロピー生成率の算出　　　　　　　　　　　　　　　
  川口 佑, 菅野 円隆, 内田 淳史
  電子情報通信学会 技術研究報告, Jan. 2019, [Domestic conference]
• Photonic decision making　　　　　　　　　　　　　　　
  M. Naruse, N. Chauvet, H. Hori, S. Huant, and A. Uchida
  Dec. 2018, [International conference]
• Photonic reservoir computing with a chaotic micro-cavity　　　　　　　　　　　　　　　
  S. Sunada, T. Niiyama, A. Uchida, and K. Arai
  Dec. 2018, [International conference]
• Photonic delay-based reservoir computing on a chip　　　　　　　　　　　　　　　
  A. Uchida, K. Takano, C. Sugano, M. Inubushi, K. Yoshimura, S. Sunada, and K. Kanno
  Dec. 2018, [International conference]
• Photonic reservoir computing using a single semiconductor laser with optical feedback-phase modulation　　　　　　　　　　　　　　　
  A. A. Haya, C. Sugano, K. Kanno, and A. Uchida
  Dec. 2018, [International conference]
• Applications of complex photonics: From information security to artificial intelligence　　　　　　　　　　　　　　　
  A. Uchida
  Dec. 2018, [International conference]
• 量子ドットレーザの戻り光変化による非線形ダイナミクス実験　　　　　　　　　　　　　　　
  山崎 和人, 菅野 円隆, 松本 敦, 成瀬 誠, 内田 淳史
  Nov. 2018, [Domestic conference]
• epsilon, tau)エントロピーによるレーザカオスの予測不可能性の評価　　　　　　　　　　　　　　　
  川口 佑, 菅野 円隆, 内田 淳史
  Nov. 2018, [Domestic conference]
• レーザにおけるコンシステンシーとリザーバコンピューティングへの応用　　　　　　　　　　　　　　　
  内田 淳史
  Oct. 2018, [Domestic conference]
• 古典光及び量子光を用いた意思決定に関する研究　　　　　　　　　　　　　　　
  成瀬 誠, 内田 淳史, S. Huant
  Sep. 2018, [Domestic conference]
• 時空間ダイナミクスを用いた物理リザーバーコンピューティング　　　　　　　　　　　　　　　
  宮村 圭祐, 砂田 哲, 新山 友暁, 内田 淳史, 新井 賢一
  Sep. 2018, [Domestic conference]
• 光多重反射を利用した大規模な光ニューラルネットワーク形成とリザーバーコンピューティングへの応用　　　　　　　　　　　　　　　
  砂田 哲, 新山 友暁, 内田 淳史, 新井 賢一
  Sep. 2018, [Domestic conference]
• 複雑系フォトニクスを用いた光AI：リザーバコンピューティングと意思決定　　　　　　　　　　　　　　　
  内田 淳史
  Sep. 2018, [Domestic conference]
• 強化学習を併用した光リザーバコンピューティングの提案　　　　　　　　　　　　　　　
  菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2018, [Domestic conference]
• マルチモード半導体レーザを用いた周波数帯域拡大カオス生成実験　　　　　　　　　　　　　　　
  小田 航也, 吉屋 圭吾, 川口 佑, 内田 淳史
  Sep. 2018, [Domestic conference]
• 相互結合された半導体レーザの遅延カオス同期における自発的スイッチング実験　　　　　　　　　　　　　　　
  三井 湧方, 巳鼻 孝朋, 菅野 円隆, 内田 淳史
  Sep. 2018, [Domestic conference]
• 短距離フィードバックを有する半導体レーザを用いたリザーバコンピューティングの記憶容量　　　　　　　　　　　　　　　
  菅野 千紘, 高野 耕輔, アフィカ アマリナ ハヤ, 菅野 円隆, 内田 淳史
  Sep. 2018, [Domestic conference]
• 戻り光位相変調された半導体レーザを用いた光リザーバコンピューティング実験　　　　　　　　　　　　　　　
  アフィカ アマリナ ハヤ, 菅野 千紘, 菅野 円隆, 内田 淳史
  Sep. 2018, [Domestic conference]
• 相互結合された半導体レーザにおける遅延カオス同期を用いた意思決定の数値解析　　　　　　　　　　　　　　　
  巳鼻 孝朋, 三井 湧方, 菅野 円隆, 成瀬 誠, 内田 淳史
  Sep. 2018, [Domestic conference]
• Reservoir computing model based on spatiotemporal dynamics　　　　　　　　　　　　　　　
  K. Miyamura, S. Sunada, A. Uchida, and T. Niiyama
  Proceedings of 2018 International Symposium on Nonlinear Theory and Its Applications, Sep. 2018, [International conference]
• Wave dynamical reservoir computing at a microscale　　　　　　　　　　　　　　　
  S. Sunada, K. Arai, and A. Uchida
  Proceedings of 2018 International Symposium on Nonlinear Theory and Its Applications, Sep. 2018, [International conference]
• Mutually coupled optoelectronic systems with different delays for reservoir computing　　　　　　　　　　　　　　　
  K. Kanno, M. Bunsen, and A. Uchida
  Proceedings of 2018 International Symposium on Nonlinear Theory and Its Applications, Sep. 2018, [International conference]
• Decision making by classical and quantum light　　　　　　　　　　　　　　　
  M. Naruse, N. Chauvet, D. Jegouso, A. Uchida, H. Hori, A. Drezet, B. Boulanger, S. Huant, and G. Bachelier
  Proceedings of 2018 International Symposium on Nonlinear Theory and Its Applications, Sep. 2018, [International conference]
• Optical decision making with a semiconductor ring laser　　　　　　　　　　　　　　　
  R. Homma, S. Kochi, T. Niiyama, A. Uchida, M. Naruse, and S. Sunada
  Proceedings of 2018 International Symposium on Nonlinear Theory and Its Applications, Sep. 2018, [International conference]
• Decision making using lag synchronization of chaos in mutually-coupled semiconductor lasers　　　　　　　　　　　　　　　
  T. Mihana, Y. Mitsui, K. Kanno, M. Naruse, and A. Uchida
  Proceedings of 2018 International Symposium on Nonlinear Theory and Its Applications, Sep. 2018, [International conference]
• Experiment on leader-laggard relationship in mutually-coupled semiconductor lasers with time delay　　　　　　　　　　　　　　　
  Y. Mitsui, T. Mihana, K. Kanno, and A. Uchida
  Proceedings of 2018 International Symposium on Nonlinear Theory and Its Applications, Sep. 2018, [International conference]
• Entropy estimation of white chaos generated from optical heterodyne for random number generation　　　　　　　　　　　　　　　
  K. Yoshiya and A. Uchida
  Proceedings of 2018 International Symposium on Nonlinear Theory and Its Applications, Sep. 2018, [International conference]
• Reservoir computing using semiconductor laser with short external cavity　　　　　　　　　　　　　　　
  C. Sugano, K. Takano, K. Kanno, M. Inubushi, K. Yoshimura, and A. Uchida
  Proceedings of 2018 International Symposium on Nonlinear Theory and Its Applications, Sep. 2018, [International conference]
• Decision making by classical and quantum light　　　　　　　　　　　　　　　
  M. Naruse, N. Chauvet, D. Jegouso, A. Uchida, H. Hori, A. Drezet, B. Boulanger, S. Huant, and G. Bachelier
  Aug. 2018, [International conference]
• Decision making by photonics　　　　　　　　　　　　　　　
  M. Naruse, A. Uchida, H. Hori, N. Chauvet, A. Drezet, G. Bachelier, S. Huant
  Jul. 2018, [International conference]
• Transform single photons to ultrafast decision making　　　　　　　　　　　　　　　
  M. Naruse, A. Uchida, H. Hori, N. Chauvet, A. Drezet, G. Bachelier, and S. Huant
  Jul. 2018, [International conference]
• Entangled photons, a new resource for social decision making　　　　　　　　　　　　　　　
  N. Chauvet, N. Chauvet, M. Naruse, A. Uchida, H. Hori, A. Drezet, G. Bachelier, S. Huant
  Jul. 2018, [International conference]
• 半導体レーザカオス波形を用いた事前知識なしにおける意思決定の調査　　　　　　　　　　　　　　　
  小田 章裕, 巳鼻 孝朋, 成瀬 誠, 内田 淳史
  2018年 第65回応用物理学会春季学術講演会 講演予稿集, Mar. 2018, [Domestic conference]
• レーザカオスの時分割多重によるスケーラブルな強化学習　　　　　　　　　　　　　　　
  成瀬 誠, 巳鼻 孝朋, 堀 裕和, 西郷 甲矢人, 岡村 和弥, 内田 淳史
  2018年 第65回応用物理学会春季学術講演会 講演予稿集, Mar. 2018, [Domestic conference]
• 半導体リングレーザーの高速ランダムスイッチングダイナミクスを用いた意思決定の検討　　　　　　　　　　　　　　　
  本間 竜太郎, 河内 聡志, 新山 友暁, 内田 淳史, 成瀬 誠, 砂田 哲
  2018年 第65回応用物理学会春季学術講演会 講演予稿集, Mar. 2018, [Domestic conference]
• 位相変調された戻り光を有する半導体レーザに基づくリザーバコンピューティング　　　　　　　　　　　　　　　
  菅野 円隆, 内田 淳史, 文仙 正俊
  2018年 第65回応用物理学会春季学術講演会 講演予稿集, Mar. 2018, [Domestic conference]
• 半導体レーザを搭載した光集積回路によるリザーバコンピューティング実験　　　　　　　　　　　　　　　
  高野 耕輔, 菅野 千紘, 内田 淳史, 犬伏 正信, 吉村 和之
  2018年 第65回応用物理学会春季学術講演会 講演予稿集, Mar. 2018, [Domestic conference]
• 光ヘテロダインによる白色カオスの光周波数差に対するエントロピーの評価　　　　　　　　　　　　　　　
  吉屋 圭悟, 内田 淳史
  2018年 第65回応用物理学会春季学術講演会 講演予稿集, Mar. 2018, [Domestic conference]
• マルチモード半導体レーザ間の共通信号入力同期における駆動光の帯域制限実験　　　　　　　　　　　　　　　
  富山 真, 山崎 和人, 内田 淳史, 吉村 和之, 犬伏 正信
  2018年 第65回応用物理学会春季学術講演会 講演予稿集, Mar. 2018, [Domestic conference]
• マルチモード半導体レーザを用いた共通信号入力同期における帯域制限の影響　　　　　　　　　　　　　　　
  山崎 和人, 富山 真, 内田 淳史, 吉村 和之, 犬伏 正信
  2018年電子情報通信学会 総合大会 講演論文集, Mar. 2018, [Domestic conference]
• 3つの一方向結合された半導体レーザにおける帯域拡大カオスとエントロピーの数値計算　　　　　　　　　　　　　　　
  川口 佑, 吉屋 圭悟, 小田 航也, 内田 淳史
  2018年電子情報通信学会 総合大会 講演論文集, Mar. 2018, [Domestic conference]
• レーザのカオス同期とコンシステンシー：情報セキュリティから人工知能への応用まで　　　　　　　　　　　　　　　
  内田 淳史
  2018年電子情報通信学会 総合大会 講演論文集, Mar. 2018, [Domestic conference]
• 半導体リングレーザーを用いた高速・最適意思決定に関する検討　　　　　　　　　　　　　　　
  河内 聡志, 本間 竜太郎, 砂田 哲, 新山 友暁, 内田 淳史
  Dec. 2017, [Domestic conference]
• Experiment on temporal mask effect in laser dynamical reservoir computing　　　　　　　　　　　　　　　
  Y. Kuriki, K. Takano, C. Sugano, and A. Uchida
  Proceedings of 2017 International Symposium on Nonlinear Theory and Its Applications, Dec. 2017, [International conference]
• Information processing based on an external-cavity semiconductor laser with optical feedback-phase modulation　　　　　　　　　　　　　　　
  K. Kanno, C. Sugano, K. Takano, A. Uchida, and M. Bunsen
  Proceedings of 2017 International Symposium on Nonlinear Theory and Its Applications, Dec. 2017, [International conference]
• Adaptation of decision making with chaotic semiconductor laser　　　　　　　　　　　　　　　
  T. Mihana, Y. Terashima, M. Naruse, S.-J. Kim, and A. Uchida
  Proceedings of 2017 International Symposium on Nonlinear Theory and Its Applications, Dec. 2017, [International conference]
• Numerical analysis on dynamics-dependent synchronization in mutually-coupled semiconductor lasers　　　　　　　　　　　　　　　
  S. Ohara, K. Kanno, and A. Uchida
  Proceedings of 2017 International Symposium on Nonlinear Theory and Its Applications, Dec. 2017, [International conference]
• 物理乱数生成における光ヘテロダインを用いた白色カオスのエントロピーの評価と比較　　　　　　　　　　　　　　　
  吉屋 圭悟, 寺島 悠太, 内田 淳史
  Optics & Photonics Japan 2017, 日本光学会年次学術講演会 講演予稿集, Oct. 2017, [Domestic conference]
• スーパールミネッセントダイオードと後処理用電子回路による実時間物理乱数生成　　　　　　　　　　　　　　　
  小田 航也, 寺島 悠太, 吉屋 圭悟, 内田 淳史
  Optics & Photonics Japan 2017, 日本光学会年次学術講演会 講演予稿集, Oct. 2017, [Domestic conference]
• 相互結合型半導体レーザにおけるリーダ-ラガード同期　　　　　　　　　　　　　　　
  三井 湧方, 巳鼻 孝朋, 小原 翔馬, 内田 淳史
  Optics & Photonics Japan 2017, 日本光学会年次学術講演会 講演予稿集, Oct. 2017, [Domestic conference]
• 短距離フィードバックを有する半導体レーザにおけるリザーバコンピューティングの数値計算　　　　　　　　　　　　　　　
  菅野 千紘, 高野 耕輔, 内田 淳史, 犬伏 正信, 吉村 和之
  Optics & Photonics Japan 2017, 日本光学会年次学術講演会 講演予稿集, Oct. 2017, [Domestic conference]
• レーザのダイナミクスを用いたリザーバコンピューティング　　　　　　　　　　　　　　　
  内田 淳史
  Sep. 2017, [Domestic conference]
• 戻り光を有する半導体レーザの光集積回路を用いたリザーバコンピューティングの実験　　　　　　　　　　　　　　　
  高野 耕輔, 菅野 千紘, 栗城 瑛将, 内田 淳史, 犬伏 正信, 吉村 和之
  2017年 第78回応用物理学会秋季学術講演会 講演予稿集, Sep. 2017, [Domestic conference]
• 広帯域ノイズ光により駆動されたマルチモード半導体レーザにおける共通信号入力同期実　　　　　　　　　　　　　　　
  富山 真, 内田 淳史, 吉村 和之, 犬伏 正信
  2017年 第78回応用物理学会秋季学術講演会 講演予稿集, Sep. 2017, [Domestic conference]
• 広帯域ノイズ光と乱数生成用電子回路を用いた実時間物理乱数生成実験　　　　　　　　　　　　　　　
  小田 航也, 寺島 悠太, 吉屋 圭悟, 内田 淳史
  2017年 第78回応用物理学会秋季学術講演会 講演予稿集, Sep. 2017, [Domestic conference]
• 相互結合された2つの半導体レーザを用いた遅延カオス同期実験におけるリーダ-ラガード関係　　　　　　　　　　　　　　　
  三井 湧方, 巳鼻 孝朋, 小原 翔馬, 内田 淳史
  2017年 第78回応用物理学会秋季学術講演会 講演予稿集, Sep. 2017, [Domestic conference]
• 非対称な戻り光を有する相互結合された半導体レーザのカオス同期の数値解析　　　　　　　　　　　　　　　
  小原 翔馬, 菅野 円隆, 内田 淳史
  2017年 第78回応用物理学会秋季学術講演会 講演予稿集, Sep. 2017, [Domestic conference]
• 綱引き理論に基づく半導体レーザカオスを用いた意思決定の性能分析　　　　　　　　　　　　　　　
  巳鼻 孝朋, 寺島 悠太, 成瀬 誠, 金 成主, 内田 淳
  2017年 第78回応用物理学会秋季学術講演会 講演予稿集, Sep. 2017, [Domestic conference]
• 短い外部共振器長を有する半導体レーザを用いたリザーバコンピューティングに関する数値計算　　　　　　　　　　　　　　　
  菅野 千紘, 高野 耕輔, 内田 淳史, 犬伏 正信, 吉村 和之
  第78回応用物理学会秋季学術講演会予稿集, Sep. 2017, [Domestic conference]
• 光ヘテロダインによる白色カオスを用いた 高速物理乱数生成におけるエントロピーの評価　　　　　　　　　　　　　　　
  吉屋 圭悟, 寺島 悠太, 内田 淳史
  2017年度電子情報通信学会ソサエティ大会 講演論文集, Sep. 2017, [Domestic conference]
• 半導体レーザカオスを用いた意思決定における記憶係数による適応性と収束性　　　　　　　　　　　　　　　
  巳鼻 孝朋, 寺島 悠太, 成瀬 誠, 金 成主, 内田 淳史
  電子情報通信学会 技術研究報告, Jul. 2017, [Domestic conference]
• Progress in random number generation with chaotic lasers　　　　　　　　　　　　　　　
  A. Uchida, K. Ugajin, Y. Terashima, and K. Yoshiya
  May 2017, [International conference]
• 短い外部共振器長における相互結合された半導体レーザのカオス同期特性の数値解析　　　　　　　　　　　　　　　
  小原 翔馬, カルサクリアン・ダル・ボスコ アンドレアス, 宇賀神 上総, 内田 淳史, 原山 卓久, 犬伏 正信
  Mar. 2017, [Domestic conference]
• 多段化された光集積回路間における共通信号入力同期実験　　　　　　　　　　　　　　　
  佐々木 卓磨, 三井 湧方, 内田 淳史, 砂田 哲, 吉村 和之, 犬伏 正信
  Mar. 2017, [Domestic conference]
• 半導体レーザの帯域拡大カオスを用いた物理乱数生成器におけるエントロピー生成率の評価　　　　　　　　　　　　　　　
  寺島 悠太, 吉屋 圭吾, 内田 淳史
  Mar. 2017, [Domestic conference]
• 半導体レーザカオスを用いた超高速意思決定における適応性の調査　　　　　　　　　　　　　　　
  巳鼻 孝朋, 寺島 悠太, 内田 淳史, 成瀬 誠, 金 成主
  Mar. 2017, [Domestic conference]
• ナノ光学とレーザーカオスを用いた超高集積・超高速意思決定　　　　　　　　　　　　　　　
  成瀬 誠, 内田 淳史, 金 成主
  Feb. 2017, [Domestic conference]
• 光学系におけるリザーバコンピューティングの最新研究状況　　　　　　　　　　　　　　　
  内田 淳史
  Jan. 2017, [Domestic conference]
• 異なるマスク信号を用いた半導体レーザーにおけるリザーバコンピューティング実験　　　　　　　　　　　　　　　
  栗城 瑛将, 高野 耕輔, 中山 丞真, 内田 淳史
  Jan. 2017, [Domestic conference]
• Chaos, noise, and physical random number generation　　　　　　　　　　　　　　　
  J. D. Hart, Y. Terashima, A. Uchida, T. E. Murphy, and R. Roy
  Jan. 2017, [International conference]
• 平均状態エントロピーを用いた半導体レーザによるリザーバコンピューティングの性能調　　　　　　　　　　　　　　　
  高野 耕輔, 栗城 瑛将, 中山 丞真, 内田 淳史
  Nov. 2016, [Domestic conference]
• 光ヘテロダインを用いた白色カオスのダイナミクス調査と物理乱数生成実験　　　　　　　　　　　　　　　
  吉屋 圭悟, 寺島 悠太, 内田 淳史
  Nov. 2016, [Domestic conference]
• 波長フィルタを適用したノイズ光源により駆動された半導体レーザの共通信号入力同期　　　　　　　　　　　　　　　
  富山 真, 鈴木 頌允, 内田 淳史, 吉村 和之, 新井 賢一, 犬伏 正信
  Nov. 2016, [Domestic conference]
• フォトン・インテリジェンス　　　　　　　　　　　　　　　
  成瀬 誠, 堀 裕和, 青野 真士, 内田 淳史, 金 成主
  Nov. 2016, [Domestic conference]
• Intermittent dynamics in lasers: Distribution mapping and random number generation　　　　　　　　　　　　　　　
  A. Karsaklian Dal Bosco, N. Sato, S. Ohara, Y. Terashima, A. Uchida, T. Harayama, and K. Yoshimura
  Proceedings of 2016 International Symposium on Nonlinear Theory and Its Applications, Nov. 2016, [International conference]
• Fast physical random bit generation using a photonic integrated circuit　　　　　　　　　　　　　　　
  Y. Terashima, K. Ugajin, A. Uchida, T. Harayama, and K. Yoshimura
  Proceedings of 2016 International Symposium on Nonlinear Theory and Its Applications, Nov. 2016, [International conference]
• Chaos synchronization and nonlinear dynamics in a photonic integrated circuit with two semiconductor lasers　　　　　　　　　　　　　　　
  S. Ohara, A. Karsaklian Dal Bosco, K. Ugajin, A. Uchida, T. Harayama, and K. Yoshimura
  Proceedings of 2016 International Symposium on Nonlinear Theory and Its Applications, Nov. 2016, [International conference]
• Common-signal-induced synchronization in photonic integrated circuits driven by constant-amplitude random-phase light　　　　　　　　　　　　　　　
  T. Sasaki, I. Kakesu, A. Uchida, S. Sunada, K. Yoshimura, and K. Arai
  Proceedings of 2016 International Symposium on Nonlinear Theory and Its Applications, Nov. 2016, [International conference]
• Experiment on reservoir computing using consistency of a semiconductor laser　　　　　　　　　　　　　　　
  Y. Kuriki, J. Nakayama, K. Takano, and A. Uchida
  Proceedings of 2016 International Symposium on Nonlinear Theory and Its Applications, Nov. 2016, [International conference]
• 光集積回路の高速カオスを用いた物理乱数生成実験と評価　　　　　　　　　　　　　　　
  寺島 悠太, 宇賀神 上総, 吉屋 圭悟, 内田 淳史, 原山 卓久, 犬伏 正信
  Sep. 2016, [Domestic conference]
• 半導体レーザを用いたリザーバコンピューティング実験におけるマスク信号の調査　　　　　　　　　　　　　　　
  栗城 瑛将, 高野 耕輔, 中山 丞真, 内田 淳史
  Sep. 2016, [Domestic conference]
• 光集積回路を用いた共通信号入力同期と相関乱数秘密鍵配送実験　　　　　　　　　　　　　　　
  佐々木 卓磨, 掛巣 和泉, 内田 淳史, 砂田 哲, 吉村 和之, 犬伏 正信
  Sep. 2016, [Domestic conference]
• 半導体レーザの過渡ダイナミクスを用いたリザーバコンピューティングの複雑性評価の数値計算　　　　　　　　　　　　　　　
  高野 耕輔, 栗城 瑛将, 中山 丞真, 内田 淳史
  Sep. 2016, [Domestic conference]
• 光ヘテロダインによる白色カオスを用いた高速物理乱数生成実験　　　　　　　　　　　　　　　
  吉屋 圭悟, 寺島 悠太, 内田 淳史
  Sep. 2016, [Domestic conference]
• 半導体レーザ間の共通信号入力同期実験における駆動用ノイズ光源の帯域制限の調査　　　　　　　　　　　　　　　
  富山 真, 鈴木 頌允, 内田 淳史, 吉村 和之, 新井 賢一, 犬伏 正信
  Sep. 2016, [Domestic conference]
• Reservoir computing with consistency of a semiconductor laser: chaos mask effect　　　　　　　　　　　　　　　
  A. Uchida
  Sep. 2016, [International conference]
• Reservoir computing based on consistency of a semiconductor laser driven by a chaos mask signal　　　　　　　　　　　　　　　
  J. Nakayama, K. Kanno, and A. Uchida
  Jun. 2016, [International conference]
• Noise and chaos in optical random number generation　　　　　　　　　　　　　　　
  J. D. Hart, Y. Terashima, A. Uchida, T. E. Murphy, and R. Roy
  May 2016, [International conference]
• 半導体レーザを有する光集積回路とビットシフト回転法を用いた物理乱数生成　　　　　　　　　　　　　　　
  宇賀神 上総, 寺島 悠太, 内田 淳史, 原山 卓久, 吉村 和之
  2016年 第63回応用物理学会春季学術講演会講演予稿集, Mar. 2016, [Domestic conference]
• 光結合されたレーザを有する光集積回路を用いた低周波不規則振動におけるカオス同期実験　　　　　　　　　　　　　　　
  小原 翔馬, 宇賀神 上総, カルサクリアン・ダル・ボスコ アンドレアス, 内田 淳史, 原山 卓久, 吉村 和之
  2016年 第63回応用物理学会春季学術講演会講演予稿集, Mar. 2016, [Domestic conference]
• 光集積回路における間欠性ルートとカオス　　　　　　　　　　　　　　　
  カルサクリアン・ダル・ボスコ アンドレアス, 秋澤 康裕, 菅野 円隆, 内田 淳史, 原山 卓久, 吉村 和之
  2016年電子情報通信学会 総合大会講演論文集, Mar. 2016, [Domestic conference]
• 有色ノイズをマスク信号として用いた半導体レーザにおけるリザーバコンピューティング　　　　　　　　　　　　　　　
  中山 丞真, 菅野 円隆, 内田 淳史
  2016年電子情報通信学会 総合大会講演論文集, Mar. 2016, [Domestic conference]
• 結合レーザーを搭載した光集積回路における低周波不規則振動とカオス同期　　　　　　　　　　　　　　　
  小原 翔馬, 宇賀神 上総, カルサクリアン・ダル・ボスコ アンドレアス, 内田 淳史, 原山 卓久, 吉村 和之
  レーザー学会第488回研究会 レーザーのカオス・ノイズダイナミクスとその応用 研究会報告, Feb. 2016, [Domestic conference]
• 半導体レーザの過渡ダイナミクスを用いたリザーバコンピューティング実験　　　　　　　　　　　　　　　
  栗城 瑛将, 中山 丞真, 内田 淳史
  レーザー学会学術講演会第36回年次大会講演予稿集, Jan. 2016, [Domestic conference]
• 帯域制限されたスーパールミネッセントダイオードによる半導体レーザ間の共通信号入力同期　　　　　　　　　　　　　　　
  鈴木 頌允, 樋田 拓也, 内田 淳史, 吉村 和之, 新井 賢一
  レーザー学会学術講演会第36回年次大会講演予稿集, Jan. 2016, [Domestic conference]
• High-frequency self-pulsations in a semiconductor laser with optical feedback in a photonic integrated circuit　　　　　　　　　　　　　　　
  A. Karsaklian Dal Bosco, K. Kanno, A. Uchida, M. Sciamanna, T. Harayama, and K. Yoshimura
  Proceedings of 2015 International Symposium on Nonlinear Theory and its Applications (NOLTA 2015), Dec. 2015, [International conference]
• Principal frequency band of cascaded single-mode semiconductor lasers injected with broadband random light　　　　　　　　　　　　　　　
  K. Yoshimura, M. Inubushi, and A. Uchida
  Proceedings of 2015 International Symposium on Nonlinear Theory and its Applications (NOLTA 2015), Dec. 2015, [International conference]
• Modulation frequency response in synchronized semiconductor lasers subject to constant-amplitude and random phase light　　　　　　　　　　　　　　　
  K. Kanno, T. Ariarakawa, A. Uchida, and M. Bunsen
  Proceedings of 2015 International Symposium on Nonlinear Theory and its Applications (NOLTA 2015), Dec. 2015, [International conference]
• Entropy enhancement in a semiconductor laser with double optical feedback　　　　　　　　　　　　　　　
  M. Tezuka, K. Kanno, A. Uchida, and M. Bunsen
  Proceedings of 2015 International Symposium on Nonlinear Theory and its Applications (NOLTA 2015), Dec. 2015, [International conference]
• Reservoir computing using a chaotic mask signal in a semiconductor laser with optical feedback　　　　　　　　　　　　　　　
  J. Nakayama, K. Kanno, and A. Uchida
  Proceedings of 2015 International Symposium on Nonlinear Theory and its Applications (NOLTA 2015), Dec. 2015, [International conference]
• Observation of antiphase dynamics of spatiotemporal chaos in a broad-area semiconductor laser　　　　　　　　　　　　　　　
  M. Arahata and A. Uchida
  Proceedings of 2015 International Symposium on Nonlinear Theory and its Applications (NOLTA 2015), Dec. 2015, [International conference]
• 光集積回路で生成されたレーザカオスとビットシフト回転法を用いた物理乱数生成　　　　　　　　　　　　　　　
  宇賀神 上総, 寺島 悠太, 内田 淳史, 原山 卓久, 吉村 和之
  Optics & Photonics Japan 2015, 日本光学会年次学術講演会講演予稿集, Oct. 2015, [Domestic conference]
• ランダム位相変調光を注入された2つの光集積回路における共通信号入力同期　　　　　　　　　　　　　　　
  佐々木 卓磨, 掛巣 和泉, 内田 淳史, 砂田 哲, 吉村 和之, 新井 賢一
  Optics & Photonics Japan 2015, 日本光学会年次学術講演会講演予稿集, Oct. 2015, [Domestic conference]
• 戻り光を有する半導体レーザを用いたリザーバコンピューティングにおけるマスク信号の調査　　　　　　　　　　　　　　　
  中山 丞真, 菅野 円隆, 内田 淳史
  Optics & Photonics Japan 2015, 日本光学会年次学術講演会講演予稿集, Oct. 2015, [Domestic conference]
• Frequency dependence of chaos synchronization of low-frequency fluctuations in a photonic integrated circuit with mutually-coupled semiconductor lasers　　　　　　　　　　　　　　　
  S. Ohara, K. Ugajin, R. Takahashi, A. Uchida, T. Harayama, and K. Yoshimura
  Dynamics Days Europe 2015 Book of Abstracts, Sep. 2015, [International conference]
• Effect of the bandwidth limitation of an optical noise signal used for common-signal induced synchronization in chaotic semiconductor lasers　　　　　　　　　　　　　　　
  N. Suzuki, T. Hida, I. Kakesu, A. Uchida, K. Yoshimura, and K. Arai
  Dynamics Days Europe 2015 Book of Abstracts, Sep. 2015, [International conference]
• 帯域拡大カオスを用いた差分法による超高速物理乱数生成方式　　　　　　　　　　　　　　　
  寺島 悠太, 岩川 健人, 宇賀神 上総, 櫻庭 良佑, 内田 淳史
  電子情報通信学会 2015年ソサイエティ大会講演論文集, Sep. 2015, [Domestic conference]
• 半導体レーザにおけるコンシステンシーを用いたリザーバコンピューティング実験　　　　　　　　　　　　　　　
  栗城 瑛将, 中山 丞真, 内田 淳史
  電子情報通信学会 2015年ソサイエティ大会講演論文集, Sep. 2015, [Domestic conference]
• 広帯域ノイズ光と光集積回路を用いた共通信号入力同期実験　　　　　　　　　　　　　　　
  佐々木 卓磨, 掛巣 和泉, 内田 淳史, 砂田 哲, 吉村 和之, 新井 賢一
  電子情報通信学会 2015年ソサイエティ大会講演論文集, Sep. 2015, [Domestic conference]
• Bifurcation to chaos in a photonic integrated circuit: the intermittency route　　　　　　　　　　　　　　　
  A. Karsaklian Dal Bosco, Y. Akizawa, K. Ugajin, K. Kanno, A. Uchida, T. Harayama, and K. Yoshimura
  Dynamics Days Europe 2015 Book of Abstracts, Sep. 2015, [International conference]
• Fast physical random number generation using a photonic integrated circuit and a differential method　　　　　　　　　　　　　　　
  K. Ugajin, Y. Terashima, A. Uchida, T. Harayama, and K. Yoshimura
  Dynamics Days Europe 2015 Book of Abstracts, Sep. 2015, [International conference]
• Recent advances in ultra-fast random number generation with chaotic lasers　　　　　　　　　　　　　　　
  A. Uchida
  Dynamics Days Europe 2015 Book of Abstracts, Sep. 2015, [International conference]
• 2つの戻り光を有する半導体レーザにおけるリアプノフスペクトラム解析　　　　　　　　　　　　　　　
  手塚 美和, 菅野 円隆, 内田 淳史, 文仙 正俊
  2015年電子情報通信学会 総合大会予稿集, Mar. 2015, [Domestic conference]
• 相互結合された半導体レーザを有する光集積回路を用いたカオス同期の周波数依存性　　　　　　　　　　　　　　　
  小原 翔馬, 宇賀神 上総, 高橋 里枝, 原山 卓久, 吉村 和之, 内田 淳史
  2015年電子情報通信学会 総合大会予稿集, Mar. 2015, [Domestic conference]
• カオスマスク信号を用いた半導体レーザのコンシステンシーに基づくリザーバコンピューティング　　　　　　　　　　　　　　　
  中山 丞真, 菅野 円隆, 内田 淳史
  2015年電子情報通信学会 総合大会予稿集, Mar. 2015, [Domestic conference]
• 光集積回路における自己パルス生成とダイナミクス　　　　　　　　　　　　　　　
  カルサクリアン・ダル・ボスコ アンドレアス, 宇賀神 上総, 菅野 円隆, 原山 卓久, 吉村 和之, 内田 淳史
  2015年電子情報通信学会 総合大会予稿集, Mar. 2015, [Domestic conference]
• ブロードエリア半導体レーザの空間モード間の反位相ダイナミクスの数値計算　　　　　　　　　　　　　　　
  荒幡 真也, 内田 淳史
  2015年 第62回応用物理学会春季学術講演会予稿集, Mar. 2015, [Domestic conference]
• 不均一な注入電流を有するブロードエリア半導体レーザにおける時空カオスの数値解析　　　　　　　　　　　　　　　
  野澤 隆宏, 荒幡 真也, 森勝 進一朗, 内田 淳史
  2015年 第62回応用物理学会春季学術講演会予稿集, Mar. 2015, [Domestic conference]
• 戻り光を有する半導体レーザのコンシステンシーを用いたリザーバコンピューティングの数値計算　　　　　　　　　　　　　　　
  中山 丞真, 菅野 円隆, 内田 淳史
  Optics & Photonics Japan 2014, 日本光学会年次学術講演会予稿集, Nov. 2014, [Domestic conference]
• 広帯域なスーパールミネッセントダイオード光を注入された半導体レーザ間の共通信号入力同期実験　　　　　　　　　　　　　　　
  鈴木 頌允, 樋田 拓也, 掛巣 和泉, 内田 淳史, 吉村 和之, 新井 賢一
  Optics & Photonics Japan 2014, 日本光学会年次学術講演会予稿集, Nov. 2014, [Domestic conference]
• レーザカオス発生用光集積回路と差分法を用いた高速物理乱数生成　　　　　　　　　　　　　　　
  宇賀神 上総, 高橋 里枝, 内田 淳史, 原山 卓久, 吉村 和之
  Optics & Photonics Japan 2014, 日本光学会年次学術講演会予稿集, Nov. 2014, [Domestic conference]
• スーパールミネッセントダイオードを用いた共通信号入力同期と相関乱数秘密鍵配送実験　　　　　　　　　　　　　　　
  鈴木 頌允, 樋田 拓也, 掛巣 和泉, 内田 淳史, 吉村 和之, 新井 賢一
  2014年 第75回応用物理学会秋季学術講演会予稿集, Sep. 2014, [Domestic conference]
• 短距離で相互結合された半導体レーザにおける周波数帯域拡大カオスの生成　　　　　　　　　　　　　　　
  岩川 健人, 菅野 円隆, 内田 淳史
  2014年 第75回応用物理学会秋季学術講演会予稿集, Sep. 2014, [Domestic conference]
• レーザカオス発生用相互結合型光集積回路におけるカオス同期実験　　　　　　　　　　　　　　　
  宇賀神 上総, 高橋 里枝, 内田 淳史, 原山 卓久, 都築 健, 砂田 哲, 吉村 和之, 新井 賢一, デイビス ピーター
  2014年 第75回応用物理学会秋季学術講演会予稿集, Sep. 2014, [Domestic conference]
• Steady state analysis of short-term exchange of leader-laggard relationship in chaotic synchronized semiconductor lasers with low-frequency fluctuations　　　　　　　　　　　　　　　
  K. Kanno, T. Hida, A. Uchida, and M. Bunsen
  Proceedings of 2014 International Symposium on Nonlinear Theory and its Applications (NOLTA 2014), Sep. 2014, [International conference]
• Frequency dependence of common-signal-induced synchronization in semiconductor lasers with constant-amplitude and random-phase light　　　　　　　　　　　　　　　
  I. Kakesu, N. Suzuki, A. Uchida, K. Yoshimura, K. Arai, and P. Davis
  Proceedings of 2014 International Symposium on Nonlinear Theory and its Applications (NOLTA 2014), Sep. 2014, [International conference]
• Synchronization induced by common ASE noise in semiconductor lasers　　　　　　　　　　　　　　　
  K. Arai, K. Yoshimura, S. Sunada, and A. Uchida
  Proceedings of 2014 International Symposium on Nonlinear Theory and its Applications (NOLTA 2014), Sep. 2014, [International conference]
• Spectral characteristics of consistency of a single-mode semiconductor laser injected with broadband random light　　　　　　　　　　　　　　　
  K. Yoshimura, J. Muramatsu, A. Uchida, and P. Davi
  Proceedings of 2014 International Symposium on Nonlinear Theory and its Applications (NOLTA 2014), Sep. 2014, [International conference]
• Reservoir computing using consistency of semiconductor lasers with optical feedback and injection　　　　　　　　　　　　　　　
  J. Nakayama, K. Kanno, and A. Uchida
  Proceedings of 2014 International Symposium on Nonlinear Theory and its Applications (NOLTA 2014), Sep. 2014, [International conference]
• ブロードエリア半導体レーザにおける多重空間モードの位相ダイナミクス　　　　　　　　　　　　　　　
  荒幡 真也、内田 淳史
  電子情報通信学会 2014年総合大会, Mar. 2014, [Domestic conference]
• 広帯域ノイズ光を用いた半導体レーザの共通信号入力同期実験　　　　　　　　　　　　　　　
  樋田 拓也、鈴木 頌允、菅野 円隆、内田 淳史、吉村 和之、新井 賢一
  電子情報通信学会 2014年総合大会, Mar. 2014, [Domestic conference]
• ブロードエリア半導体レーザーにおける位相ダイナミクスの周波数依存性　　　　　　　　　　　　　　　
  荒幡 真也、内田 淳史
  レーザー学会研究会 レーザーのカオス・ノイズ・ダイナミクスとその応用, Feb. 2014, [Domestic conference]
• 共通信号入力同期した半導体レーザーカオスにおける過渡状態のリアプノフ指数の算出　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  レーザー学会研究会 レーザーのカオス・ノイズ・ダイナミクスとその応用, Feb. 2014, [Domestic conference]
• 低周波不規則振動で同期した半導体レーザカオスにおけるLeader-Laggard関係の定常解解析　　　　　　　　　　　　　　　
  菅野 円隆、樋田 拓也、内田 淳史
  電子情報通信学会 技術研究報告, Jan. 2014, [Domestic conference]
• 半導体レーザカオス発生用光集積回路を用いた物理乱数生成　　　　　　　　　　　　　　　
  高橋 里枝、秋澤 康裕、内田 淳史、原山 卓久、都築 健、砂田 哲、吉村 和之、新井 賢一、デイビス ピーター
  Optics & Photonics Japan 2013、日本光学会年次学術講演会, Nov. 2013, [Domestic conference]
• 一方向結合された三つの半導体レーザーによる帯域拡大カオスを用いた高速物理乱数生成実験　　　　　　　　　　　　　　　
  櫻庭 良佑、菅野 円隆、岩川 健人、内田 淳史
  Optics & Photonics Japan 2013、日本光学会年次学術講演会, Nov. 2013, [Domestic conference]
• カスケード接続された半導体レーザーにおける共通ランダム信号入力同期を用いた秘密鍵配送実験　　　　　　　　　　　　　　　
  掛巣 和泉、小泉 勇人、森勝 進一朗、会田 裕貴、野澤 隆宏、内田 淳史、吉村 和之、村松 純、デイビス ピーター
  Optics & Photonics Japan 2013、日本光学会年次学術講演会, Nov. 2013, [Domestic conference]
• Antiphase dynamics of multi-transverse modes in broad-area semiconductor lasers　　　　　　　　　　　　　　　
  M. Arahata, and A. Uchida
  Frontiers in Optics 2013 Technical Digest, Oct. 2013, [International conference]
• Physical random number generation using photonic integrated circuit with mutually-coupled semiconductor lasers　　　　　　　　　　　　　　　
  R. Takahashi, Y. Akizawa, A. Uchida, T. Harayama, K. Tsuzuki, S. Sunada, K. Yoshimura, K. Arai, and P. Davis
  Frontiers in Optics 2013 Technical Digest, Oct. 2013, [International conference]
• Complexity and frequency bandwidth in unidirectionally-coupled semiconductor lasers with optical feedback　　　　　　　　　　　　　　　
  K. Kanno and A. Uchida
  Frontiers in Optics 2013 Technical Digest, Oct. 2013, [International conference]
• Bandwidth enhancement of chaos in three cascaded semiconductor lasers　　　　　　　　　　　　　　　
  R. Sakuraba, K. Kanno, K. Iwakawa, and A. Uchida
  Frontiers in Optics 2013 Technical Digest, Oct. 2013, [International conference]
• Statistical evaluation of correlation for physical random number generation with chaotic semiconductor lasers　　　　　　　　　　　　　　　
  K. Iwakawa, K. Kanno, R. Sakuraba, Y. Akizawa, and A. Uchida
  Frontiers in Optics 2013 Technical Digest, Oct. 2013, [International conference]
• Secure key distribution using common-signal-induced synchronization in cascaded semiconductor lasers　　　　　　　　　　　　　　　
  I. Kakesu, H. Koizumi, S. Morikatu, H. Aida, T. Nozawa, A. Uchida, K. Yoshimura, J. Muramatsu, and P. Davis
  Frontiers in Optics 2013 Technical Digest, Oct. 2013, [International conference]
• 半導体レーザカオスを用いた物理乱数の相関の統計的評価　　　　　　　　　　　　　　　
  岩川 健人、菅野 円隆、櫻庭 良佑、秋澤 康裕、内田 淳史
  電子情報通信学会 2013年ソサイエティ大会, Sep. 2013, [Domestic conference]
• 一方向結合された3つの半導体レーザを用いたカオス周波数帯域拡大実験　　　　　　　　　　　　　　　
  櫻庭 良佑、菅野 円隆、岩川 健人、内田 淳史
  電子情報通信学会 2013年ソサイエティ大会, Sep. 2013, [Domestic conference]
• 相互結合された半導体レーザを有する光集積回路における物理乱数生成実験　　　　　　　　　　　　　　　
  高橋 里枝、秋澤 康裕、内田 淳史、原山 卓久、都築 健、砂田 哲、吉村 和之、新井 賢一、デイビス ピーター
  電子情報通信学会 2013年ソサイエティ大会, Sep. 2013, [Domestic conference]
• 多段化された半導体レーザにおける共通ランダム信号入力同期を用いた相関乱数暗号鍵生成実験　　　　　　　　　　　　　　　
  掛巣 和泉、小泉 勇人、森勝 進一郎、会田 裕貴、野澤 隆宏、内田 淳史、吉村 和之、村松 純、デイビス ピーター
  電子情報通信学会 2013年ソサイエティ大会, Sep. 2013, [Domestic conference]
• ブロードエリア半導体レーザの横モード間における反位相ダイナミクスの実験的観測　　　　　　　　　　　　　　　
  荒幡 真也、内田 淳史
  2013年秋季 第74回応用物理学会学術講演会, Sep. 2013, [Domestic conference]
• Estimation of maximum Lyapunov exponent using generalized synchronization in semiconductor lasers with optical feedback　　　　　　　　　　　　　　　
  K. Kanno and A. Uchida
  Proceedings of 2013 International Symposium on Nonlinear Theory and its Applications (NOLTA 2013), Sep. 2013, [International conference]
• Noise effects on generalized chaos synchronization in semiconductor lasers　　　　　　　　　　　　　　　
  K, Arai, S. Shinohara, S. Sunada, K. Yoshimura, T. Harayama, and A. Uchida
  Proceedings of 2013 International Symposium on Nonlinear Theory and its Applications (NOLTA 2013), Sep. 2013, [International conference]
• Synchronization of semiconductor lasers by injection of common broadband random light　　　　　　　　　　　　　　　
  K. Yoshimura, J. Muramatsu, K. Arai, S. Shinohara, and A. Uchida
  Proceedings of 2013 International Symposium on Nonlinear Theory and its Applications (NOLTA 2013), Sep. 2013, [International conference]
• 戻り光を有する半導体レーザにおける一般化同期を用いたリアプノフ指数の算出　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  電子情報通信学会 技術研究報告, Jul. 2013, [Domestic conference]
• 外部共振器を有するカオス発生用光集積回路による高速物理乱数生成　　　　　　　　　　　　　　　
  高橋 里枝、秋澤 康裕、山崎 泰基、内田 淳史、原山 卓久、都築 健、砂田 哲、吉村 和之、新井 賢一、デイビス ピーター
  電子情報通信学会 技術研究報告, Jul. 2013, [Domestic conference]
• 双方向に光結合された半導体レーザの遅延カオス同期における Leader-Laggard 関係の自発的スイッチング　　　　　　　　　　　　　　　
  樋田 拓也、菅野 円隆、内田 淳史
  電子情報通信学会 技術研究報告, Jul. 2013, [Domestic conference]
• ブロードエリア半導体レーザにおける高速カオスの横モード分割ダイナミクスの実験的観測　　　　　　　　　　　　　　　
  荒幡 真也、内田 淳史
  2013年春季 第60回応用物理学関係連合講演会, 2013, [Domestic conference]
• 半導体レーザのコンシステンシーを用いた符号化と復号におけるパラメータ偏差の影響　　　　　　　　　　　　　　　
  高橋 純一、菅野 円隆、内田 淳史
  電子情報通信学会 2013年総合大会, 2013, [Domestic conference]
• 短距離で相互結合された半導体レーザにおけるカオス同期のLeader-Laggard関係　　　　　　　　　　　　　　　
  真田 圭佑、内田 淳史
  電子情報通信学会 2013年総合大会, 2013, [Domestic conference]
• 光注入された半導体レーザーにおけるカオスの複雑性と周波数帯域　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  第442回レーザー学会研究会, 2013, [Domestic conference]
• 時間遅延ダイナミカルシステムにおける有限時間リアプノフ指数の算出　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  非線形問題研究会, 2013, [Domestic conference]
• 相互結合された半導体レーザにおける遅延カオス同期のLeader-Laggard関係の自発的スイッチング　　　　　　　　　　　　　　　
  樋田 拓也、菅野 円隆、内田 淳史
  2012年秋季 第73回応用物理学会学術講演会, 2012, [Domestic conference]
• 高速カオス発生用光集積回路を用いた物理乱数生成　　　　　　　　　　　　　　　
  高橋 里枝、秋澤 康裕、山崎 泰基、内田 淳史、原山 卓久、都築 健、砂田 哲、吉村 和之、新井 賢一、デイビス ピーター
  2012年秋季 第73回応用物理学会学術講演会, 2012, [Domestic conference]
• 高速カオス発生用光集積回路の非線形ダイナミクス　　　　　　　　　　　　　　　
  秋澤 康裕、高橋 里枝、会田 裕貴、山崎 泰基、内田 淳史、原山 卓久、都築 健、砂田 哲、吉村 和之、新井 賢一、デイビス ピーター
  2012年秋季 第73回応用物理学会学術講演会, 2012, [Domestic conference]
• ブロードエリア半導体レーザにおける高速カオスの実験的観測　　　　　　　　　　　　　　　
  荒幡 真也、内田 淳史
  2012年秋季 第73回応用物理学会学術講演会, 2012, [Domestic conference]
• カオス発生用マッキー・グラス電子回路を用いた実時間物理乱数生成　　　　　　　　　　　　　　　
  櫻庭 良佑、山崎 泰基、内田 淳史
  電子情報通信学会 2012年ソサイエティ大会, 2012, [Domestic conference]
• 時間遅延ダイナミカルシステムの有限時間リアプノフ指数の解析　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  電子情報通信学会 2012年ソサイエティ大会, 2012, [Domestic conference]
• 半導体レーザにおける共通信号入力同期を用いた秘密鍵配送実験　　　　　　　　　　　　　　　
  小泉 勇人、森勝 進一朗、会田 裕貴、荒幡 真也、野澤 隆宏、内田 淳史、吉村 和之、村松 純、デイビス ピーター
  電子情報通信学会 2012年ソサイエティ大会, 2012, [Domestic conference]
• Nonlinear dynamics in a photonic integrated circuit for fast chaos generation　　　　　　　　　　　　　　　
  Y. Akizawa, R. Takahashi, H. Aida, T. Yamazaki, A. Uchida, T. Harayama, K. Tsuzuki, S. Sunada, K. Yoshimura, K. Arai, and P. Davis
  Proceedings of 2012 International Symposium on Nonlinear Theory and its Applications (NOLTA 2012), 2012, [International conference]
• Random number generation with a photonic integrated circuit for fast chaos generation　　　　　　　　　　　　　　　
  R. Takahashi, Y. Akizawa, T. Yamazaki, A. Uchida, T. Harayama, K. Tsuzuki, S. Sunada, K. Yoshimura, K. Arai, and P. Davis
  Proceedings of 2012 International Symposium on Nonlinear Theory and its Applications (NOLTA 2012), 2012, [International conference]
• Fast random number generation with bandwidth-enhanced chaos and post-processing　　　　　　　　　　　　　　　
  T. Yamazaki, Y. Akizawa, A. Uchida, K. Yoshimura, K. Arai, and P. Davis
  Proceedings of 2012 International Symposium on Nonlinear Theory and its Applications (NOLTA 2012), 2012, [International conference]
• 結合半導体レーザにおけるコンシステンシーと複雑性解析　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  2012年春季 第59回 応用物理学関係連合講演会, 2012, [Domestic conference]
• ランダム位相変調光で駆動された半導体レーザ間の共通信号入力同期実験　　　　　　　　　　　　　　　
  会田 裕貴、小泉 勇人、内田 淳史、吉村 和之、デイビス ピーター
  2012年春季 第59回 応用物理学関係連合講演会, 2012, [Domestic conference]
• Noise amplification based on dynamical instabilities in semiconductor laser systems and its application to nondeterministic random bit generators　　　　　　　　　　　　　　　
  S. Sunada, T. Harayama, P. Davis, K. Arai, K. Yoshimura, K. Tsuzuki, M. Adachi, and A. Uchida
  Proceedings of 2012 International Symposium on Nonlinear Theory and its Applications (NOLTA 2012), 2012, [International conference]
• Finite-time Lyapunov exponents in nonlinear dynamical systems with time-delayed feedback　　　　　　　　　　　　　　　
  K. Kanno and A. Uchida
  Proceedings of 2012 International Symposium on Nonlinear Theory and its Applications (NOLTA 2012), 2012, [International conference]
• Secure key distribution using correlated randomness in optical devices　　　　　　　　　　　　　　　
  K. Yoshimura, J. Muramatsu, P. Davis, A. Uchida, and T. Harayama
  Proceedings of 2012 International Symposium on Nonlinear Theory and its Applications (NOLTA 2012), 2012, [International conference]
• Experiment on secure key distribution using correlated random phenomenon in semiconductor lasers　　　　　　　　　　　　　　　
  H. Koizumi, S. Morikatsu, H. Aida, M. Arahata, T. Nozawa, A. Uchida, K. Yoshimura, J. Muramatsu, and P. Davis
  Proceedings of 2012 International Symposium on Nonlinear Theory and its Applications (NOLTA 2012), 2012, [International conference]
• Spontaneous exchange of leader-laggard relationship in mutually-coupled semiconductor lasers　　　　　　　　　　　　　　　
  T. Hida, K. Kanno, and A. Uchida
  Proceedings of 2012 International Symposium on Nonlinear Theory and its Applications (NOLTA 2012), 2012, [International conference]
• Fast random number generation with chaotic semiconductor lasers　　　　　　　　　　　　　　　
  Y. Akizawa, T. Yamazaki, and A. Uchida
  Dynamics Days 2012, 2012, [International conference]
• Experiment on common-signal-induced synchronization in semiconductor lasers driven by a constant-amplitude random-phase signal　　　　　　　　　　　　　　　
  H. Aida, H. Okumura, M. Arahata, H. Koizumi, A. Uchida, K. Yoshimura, and P. Davis
  Dynamics Days 2012, 2012, [International conference]
• Local Lyapunov exponents in semiconductor lasers with time-delayed optical feedback　　　　　　　　　　　　　　　
  K. Kanno and A. Uchida
  Dynamics Days 2012, 2012, [International conference]
• 半導体レｰザ結合システムにおけるコンシステンシｰとリアプノフ指数の評価　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  2011年春季 第58回 応用物理学関係連合講演会 講演予稿集, Mar. 2011
• スｰパｰルミネッセントダイオｰドを用いた高速物理乱数生成実験　　　　　　　　　　　　　　　
  山崎 泰基、秋澤 康裕、森勝 進一朗、奥村 悠、会田 裕貴、内田 淳史、原山 卓久、砂田 哲、新井 賢一、吉村 和之、デイビス ピーター
  2011年春季 第58回 応用物理学関係連合講演会 講演予稿集, Mar. 2011
• モノリシック集積化半導体カオスレｰザチップを用いた高速物理乱数生成　　　　　　　　　　　　　　　
  砂田 哲、原山 卓久、新井 賢一、吉村 和之、ピーター デイビス、都築 健、内田 淳史
  2011年春季 第58回 応用物理学関係連合講演会 講演予稿集, Mar. 2011
• 半導体レｰザにおけるランダム位相変調光を用いた共通信号入力同期実験　　　　　　　　　　　　　　　
  会田 裕貴、奥村 悠、染谷 弘行、内田 淳史、吉村 和之、デイビス ピーター
  2011年春季 第58回 応用物理学関係連合講演会 講演予稿集, Mar. 2011
• 帯域拡大された半導体レｰザカオスを用いた物理乱数生成の後処理方式　　　　　　　　　　　　　　　
  秋澤 康裕、山崎 泰基、内田 淳史、原山 卓久、砂田 哲、新井 賢一、吉村 和之、デイビス ピーター
  2011年春季 第58回 応用物理学関係連合講演会 講演予稿集, Mar. 2011
• レｰザカオスによる高速非決定論的物理乱数生成に関する理論的考察　　　　　　　　　　　　　　　
  砂田 哲、原山 卓久、新井 賢一、吉村 和之、ピーター デイビス、内田 淳史
  電子情報通信学会 2011年総合大会講演論文集, Mar. 2011
• ノイズを含む半導体レｰザカオスを用いた物理乱数生成器のエントロピｰ生成率　　　　　　　　　　　　　　　
  三上 拓也、菅野 円隆、青山 幸太、内田 淳史、原山 卓久、砂田 哲、新井 賢一、吉村 和之、デイビス ピーター
  電子情報通信学会 2011年総合大会講演論文集, Mar. 2011
• ランダム位相変調された半導体レｰザにおける共通信号入力同期　　　　　　　　　　　　　　　
  奥村 悠、会田 裕貴、染谷 弘行、内田 淳史、吉村 和之、デイビス ピーター
  電子情報通信学会 2011年総合大会講演論文集, Mar. 2011
• 時間遅延を有する光結合された半導体レｰザにおけるコンシステンシｰとエントロピｰ解析　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  電子情報通信学会 2011年総合大会講演論文集, Mar. 2011
• 半導体レｰザにおけるランダム位相変調光を用いた共通信号入力同期　　　　　　　　　　　　　　　
  奥村 悠、会田 裕貴、染谷 弘行、内田 淳史、吉村 和之、デイビス ピーター
  電子情報通信学会 技術研究報告, Jan. 2011
• 光結合された半導体レｰザにおけるコンシステンシｰとリアプノフスペクトラム解析　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  電子情報通信学会 技術研究報告, Jan. 2011
• カオスレｰザｰチップによる高速物理乱数生成　　　　　　　　　　　　　　　
  原山 卓久、砂田 哲、吉村 和之、ピーター デイビス、都築 健、内田 淳史
  レｰザｰ学会学術講演会第31回年次大会講演予稿集, Jan. 2011
• 帯域拡大された半導体レｰザカオスおよびマルチビットAD変換による超高速物理乱数生成実験　　　　　　　　　　　　　　　
  山崎 泰基、森勝 進一朗、奥村 悠、会田 裕貴、内田 淳史、吉村 和之、原山 卓久、砂田 哲、ピーター デイビス
  レｰザｰ学会学術講演会第31回年次大会講演予稿集, Jan. 2011
• 半導体レｰザカオスを用いた超高速物理乱数生成の振幅量子化の影響　　　　　　　　　　　　　　　
  青山 幸太、内田 淳史
  レｰザｰ学会学術講演会第31回年次大会講演予稿集, Jan. 2011
• 量子ノイズを含むレｰザｰカオスを用いた物理乱数生成器におけるエントロピｰ生成　　　　　　　　　　　　　　　
  三上 拓也、青山 幸太、菅野 円隆、内田 淳史
  レｰザｰ学会学術講演会第31回年次大会講演予稿集, Jan. 2011
• 半導体レｰザｰにおけるコンシステンシｰと複雑性の評価　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  レｰザｰ学会学術講演会第31回年次大会講演予稿集, Jan. 2011
• Ultra-fast random number generation with chaotic lasers　　　　　　　　　　　　　　　
  A. Uchida
  International Symposium on Physics and Applications of Laser Dynamics 2011 (IS-PALD2011), 2011, [Invited], [International conference]
• 注入電流変化におけるブロードエリア半導体レーザーの時空カオス現象　　　　　　　　　　　　　　　
  森勝 進一朗、内田 淳史
  Optics & Photonics Japan 2011、日本光学会年次学術講演会, 2011, [Domestic conference]
• On-chip chaos lasers for fast non-deterministic random bit generation　　　　　　　　　　　　　　　
  S. Sunada, T. Harayama, K. Arai, K. Yoshimura, P. Davis, K. Tsuzuki, and A. Uchida
  Proceedings of 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA 2011), 2011, [International conference]
• Experiment on fast physical random bit generation with bandwidth-enhanced chaotic semiconductor lasers　　　　　　　　　　　　　　　
  T. Yamazaki, Y. Akizawa, S. Morikatsu, H. Aida, A. Uchida, T. Harayama, S. Sunada, K. Arai, K. Yoshimura, and P. Davis
  Proceedings of 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA 2011), 2011, [International conference]
• Post-processing method for fast random bit generation with semiconductor lasers　　　　　　　　　　　　　　　
  Y. Akizawa, T. Yamazaki, A. Uchida, T. Harayama, S. Sunada, K. Arai, K. Yoshimura, and P. Davis
  Proceedings of 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA 2011), 2011, [International conference]
• Estimation of entropy rate for random bit generators with chaotic semiconductor lasers　　　　　　　　　　　　　　　
  T. Mikami, K. Kanno, K. Aoyama, A. Uchida, T. Harayama, S. Sunada, K. Arai, K. Yoshimura, and P. Davis
  Proceedings of 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA 2011), 2011, [International conference]
• Consistency and synchronization in a delay-coupled neuronal network with synaptic plasticity　　　　　　　　　　　　　　　
  T. Perez, A. Uchida, and C. R. Mirasso
  Proceedings of 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA 2011), 2011, [International conference]
• Multiplexed communications with chaotic optoelectronic devices　　　　　　　　　　　　　　　
  D. Rontani, A. Locquet, M. Sciamanna, D. S. Citrin, and A. Uchida
  Proceedings of 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA 2011), 2011, [International conference]
• Consistency and complexity in coupled semiconductor lasers with time-delayed optical feedback　　　　　　　　　　　　　　　
  K. Kanno and A. Uchida
  Proceedings of 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA 2011), 2011, [International conference]
• Synchronization of semiconductor lasers driven by common optical injection with constant-amplitude and random-phase modulation　　　　　　　　　　　　　　　
  K. Yoshimura, A. Uchida, P. Davis, J. Muramatsu, T. Harayama, and S. Sunada
  roceedings of 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA 2011), 2011, [International conference]
• Experiment on common-signal-induced synchronization with constant-amplitude random-phase drive signal　　　　　　　　　　　　　　　
  H. Aida, H. Okumura, M. Arahata, H. Koizumi, A. Uchida, K. Yoshimura, and P. Davis
  Proceedings of 2011 International Symposium on Nonlinear Theory and its Applications (NOLTA 2011), 2011, [International conference]
• 光デバイスにおける相関ランダム現象を用いた秘密鍵配送　　　　　　　　　　　　　　　
  吉村 和之、村松 純、デイビス ピーター、内田 淳史、原山 卓久
  電子情報通信学会 技術研究報告（信学技報 NLP2011-106）, 2011, [Domestic conference]
• 半導体レーザにおける相関ランダム現象を用いた秘密鍵配送実験　　　　　　　　　　　　　　　
  小泉 勇人、森勝 進一朗、会田 裕貴、荒幡 真也、内田 淳史、吉村 和之、村松 純、デイビス ピーター
  電子情報通信学会 技術研究報告（信学技報 NLP2011-107）, 2011, [Domestic conference]
• 戻り光を有する半導体レーザにおける局所的リアプノフ指数の評価　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  電子情報通信学会 技術研究報告（信学技報 NLP2011-109）, 2011, [Domestic conference]
• 半導体レーザカオスを用いた物理乱数生成の後処理による高速化　　　　　　　　　　　　　　　
  秋澤 康裕、山崎 泰基、内田 淳史、原山 卓久、砂田 哲、新井 賢一、吉村 和之、デイビス ピーター
  電子情報通信学会 2011年ソサイエティ大会, 2011, [Domestic conference]
• ブロードエリアレーザにおける時空カオスとダイナミクス　　　　　　　　　　　　　　　
  森勝 進一朗、内田 淳史
  電子情報通信学会 2011年ソサイエティ大会, 2011, [Domestic conference]
• 半導体レーザによるランダム位相変調光を用いた共通ノイズ同期実験　　　　　　　　　　　　　　　
  会田 裕貴、奥村 悠、荒幡 真也、小泉 勇人、内田 淳史、吉村 和之、デイビス ピーター
  電子情報通信学会 2011年ソサイエティ大会, 2011, [Domestic conference]
• Fast physical random number generation with bandwidth enhancement of chaotic semiconductor lasers　　　　　　　　　　　　　　　
  T. Yamazaki, Y. Akizawa, A. Uchida, T. Harayama, S. Sunada, K. Yoshimura, and P. Davis
  Frontiers in Optics 2011 Technical Digest, 2011, [International conference]
• Post-processing method for fast random number generation with chaotic semiconductor lasers　　　　　　　　　　　　　　　
  Y. Akizawa, T. Yamazaki, and A. Uchida
  Frontiers in Optics 2011 Technical Digest, 2011, [International conference]
• Complexity analysis in optically-coupled chaotic semiconductor lasers with consistency　　　　　　　　　　　　　　　
  K. Kanno and A. Uchida
  Frontiers in Optics 2011 Technical Digest, 2011, [International conference]
• Physical random bit generator with chaotic lasers　　　　　　　　　　　　　　　
  A. Uchida, T. Yamazaki, Y. Akizawa, T. Harayama, S. Sunada, K. Yoshimura, and P. Davis
  SIAM Conference on Applications of Dynamical Systems, 2011, [International conference]
• Evaluation of local Lyapunov exponents in semiconductor lasers with time-delayed optical feedback　　　　　　　　　　　　　　　
  K. Kanno and A. Uchida
  2011 Kyoto Workshop on NOLTA, 2011, [International conference]
• Spatiotemporal chaos in a broad-area semiconductor laser with distributed injection current　　　　　　　　　　　　　　　
  S. Morikatsu and A. Uchida
  2011 Kyoto Workshop on NOLTA, 2011, [International conference]
• 半導体レｰザカオスを用いた物理乱数の超高速生成実験　　　　　　　　　　　　　　　
  山崎 泰基、森勝 進一朗、奥村 悠、会田 裕貴、内田 淳史、吉村 和之、原山 卓久、砂田 哲、ピーター ディビス
  Optics & Photonics Japan 2010 講演予稿集, Nov. 2010
• 半導体レｰザ結合系のカオス同期における複雑性の評価　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  Optics & Photonics Japan 2010 講演予稿集, Nov. 2010
• 時間遅延を有する光結合された半導体レｰザにおけるリアプノフ解析　　　　　　　　　　　　　　　
  菅野 円隆、内田 淳史
  電子情報通信学会2010年ソサイエティ大会講演論文集, Sep. 2010
• 半導体レｰザカオスを用いた物理乱数生成におけるノイズ増幅効果　　　　　　　　　　　　　　　
  三上 拓也、青山 幸太、菅野 円隆、内田 淳史
  電子情報通信学会2010年ソサイエティ大会講演論文集, Sep. 2010
• 光注入により帯域拡大された半導体レｰザカオスにおける超高速物理乱数生成　　　　　　　　　　　　　　　
  山崎 泰基、森勝 進一朗、奥村 悠、会田 裕貴、内田 淳史、吉村 和之、原山 卓久、砂田 哲、ピーター ディビス
  電子情報通信学会2010年ソサイエティ大会講演論文集, Sep. 2010
• モノリシック集積化半導体カオスレｰザチップによる物理乱数生成　　　　　　　　　　　　　　　
  砂田 哲、原山 卓久、吉村 和之、ピーター ディビス、都築 健、内田 淳史
  電子情報通信学会2010年ソサイエティ大会講演論文集, Sep. 2010
• 帯域拡大された半導体レｰザカオスを用いた超高速物理乱数生成実験　　　　　　　　　　　　　　　
  内田 淳史、山崎 泰基、森勝 進一朗、奥村 悠、会田 裕貴、吉村 和之、原山 卓久、ピーター ディビス
  電子情報通信学会技術研究報告, Jun. 2010
• Multiple-access optical chaos-based communications using optoelectronic systems　　　　　　　　　　　　　　　
  D. Rontani, A. Locquet, M. Sciamanna, D. Citrin, and A. Uchida
  Conference Digest of 2010 Conference on Lasers and Electro-Optics/ Quantum Electronics and Laser Science Conference, May 2010
• レーザカオスを用いた高速物理乱数生成　　　　　　　　　　　　　　　
  内田淳史
  第57回応用物理学関係連合講演会講演予稿集, Mar. 2010
• 半導体レーザカオスを用いた物理乱数発生　　　　　　　　　　　　　　　
  内田淳史
  共同研究集会 物理乱数・擬似乱数の発生法・検定法とその周辺, Mar. 2010
• Consistency in nonlinear dynamical systems driven by chaos and noise　　　　　　　　　　　　　　　
  A.Uchida
  Abstract of workshop on Fluctuation and Noise in Living Organisms II, Feb. 2010
• Estimation of connectivity of nonlinear systems by partial correlation analysis　　　　　　　　　　　　　　　
  黒田香織、内田淳史、池口徹
  電子情報通信学会技術研究報告, Jan. 2010
• 戻り光を有する半導体レーザのカオス現象を用いた超高速物理乱数生成実験　　　　　　　　　　　　　　　
  内田淳史、平野邦仁、天野和也、山崎泰基、吉森茂、吉村和之、ピーター ディビス
  電子情報通信学会技術研究報告, Nov. 2009
• 半導体レーザにおける光注入効果を用いた帯域拡大カオスの発生および同期　　　　　　　　　　　　　　　
  奥村悠、染谷弘行、大和田功、貴田隆彦、会田裕貴、内田淳史
  電子情報通信学会技術研究報告, Nov. 2009
• Differential-phase-shift quantum key distribution experiment using fast physical random bit generator with chaotic semiconductor lasers　　　　　　　　　　　　　　　
  T.Honjo, Y.Tokura, A.Uchida, H.Okumura, K.Amano, K.Hirano, H.Someya,K.Yoshimura, and P.Davis
  Proceedings of the 18th International Laser Physics Workshop, Jul. 2009
• Experimental evaluation of fast random bit sequence generation using chaotic semiconductor lasers　　　　　　　　　　　　　　　
  A.Uchida, K.Amano, M.Inoue, K.Hirano, S.Naito, H.Someya, I.Oowada, S.Yoshimori, K.Yoshimura, P.Davis
  Conference Digest of the European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference 2009, Jun. 2009
• Fast physical random bit generator based on chaotic semiconductor lasers: Application to quantum cryptography　　　　　　　　　　　　　　　
  A.Uchida, T.Honjo, K.Amano, K.Hirano, H.Someya, H.Okumura, S.Yoshimori, K.Yoshimura, P.Davis, Y.Tokura
  Conference Digest of the European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference 2009, Jun. 2009
• Experiment on fast random bit generation using chaotic semiconductor lasers　　　　　　　　　　　　　　　
  A.Uchida, K.Amano, M.Inoue, K.Hirano, S.Naito, H.Someya, I.Oowada, S.Yoshimori, K.Yoshimura, P.Davis
  Book of Abstracts of the 2nd Chaotic Modeling and Simulation International Conference, Jun. 2009
• 半導体レーザカオスを用いた超高速物理乱数生成　　　　　　　　　　　　　　　
  平野邦仁、天野和也、井上真樹、内藤直、染谷弘行、大和田功、内田淳史、吉森茂、吉村和之、ピーター・ディビス
  2009年電子情報通信学会総合大会予稿集, 2009, [Domestic conference]
• 半導体レーザカオスによる物理乱数の高速生成実験　　　　　　　　　　　　　　　
  平野邦仁、天野和也、井上真樹、内藤直、染谷弘行、大和田功、内田淳史、吉森茂、吉村和之、ピーター・ディビス
  第56回応用物理学関係連合講演会講演予稿集, 2009, [Domestic conference]
• レーザにおけるカオス同期とその情報通信応用　　　　　　　　　　　　　　　
  内田淳史
  リズム現象の研究会IV, 2009, [Domestic conference]
• 半導体レーザカオスを用いた超高速物理乱数生成　　　　　　　　　　　　　　　
  2009年電子情報通信学会総合大会予稿集, 2009
• 半導体レーザカオスによる物理乱数の高速生成実験　　　　　　　　　　　　　　　
  第56回応用物理学関係連合講演会講演予稿集, 2009
• レーザにおけるカオス同期とその情報通信応用　　　　　　　　　　　　　　　
  リズム現象の研究会IV, 2009
• カオスまたはノイズにて駆動された非線形電子回路におけるコンシステンシー　　　　　　　　　　　　　　　
  内田淳史
  電子情報通信学会NOLTA秋の学校「カオス現象論」, 2008, [Domestic conference]
  Poster presentation
• Chaos synchronization in mutually coupled Josephson tetrodes　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Experimental observation on fractal patterns of chaotic light scattering in regular-polyhedral mirror-ball structures　　　　　　　　　　　　　　　
  2008
• Experimental and numerical analysis on common-chaotic-signal induced synchronization in semiconductor lasers with optical feedback　　　　　　　　　　　　　　　
  2008
• Experiment on blind source separation of chaotic laser signals by independent component analysis　　　　　　　　　　　　　　　
  2008
• Generation and synchronization of chaos in mutually-coupled vertical-cavity surface-emitting lasers with multiple time-delayed couplings　　　　　　　　　　　　　　　
  2008
• 二つの時間遅延で相互結合された面発光レーザにおけるカオス発生とカオス同期の実験的観測　　　　　　　　　　　　　　　
  染谷弘行、田中和也、内田淳史、吉森茂
  電子情報通信学会技術研究報告 非線形問題, 2008, [Domestic conference]
• 非線形ダイナミカルシステムにおけるコンシステンシー　　　　　　　　　　　　　　　
  内田淳史、葉海鵬、吉森茂
  電子情報通信学会技術研究報告 非線形問題, 2008, [Domestic conference]
• 独立成分分析を用いたレーザカオス混合信号の分離　　　　　　　　　　　　　　　
  田代洋人、平野邦仁、倉屋昌彦、内田淳史、吉森茂、梅野健
  電子情報通信学会非線形問題研究会, 2008, [Domestic conference]
• 正多面体ミラー球構造体内における光散乱のフラクタル次元　　　　　　　　　　　　　　　
  天野和也、成松大輔、五月女智、内田淳史、吉森茂
  電子情報通信学会非線形問題研究会, 2008, [Domestic conference]
• 戻り光を有する半導体レーザにおける共通カオス信号入力による同期　　　　　　　　　　　　　　　
  大和田功、有泉宏紀、李茂、内田淳史、吉森茂、吉村和之、ピーター・ディビス
  電子情報通信学会非線形問題研究会, 2008, [Domestic conference]
• Blind source separation of chaotic lasers by independent component analysis　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Analysis on fractal dimension of chaotic light scattering in regular-polyhedral mirror-ball structures　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Synchronization and consistency in chaotic lasers　　　　　　　　　　　　　　　
  2008
• カオスまたはノイズにて駆動された非線形電子回路におけるコンシステンシー　　　　　　　　　　　　　　　
  電子情報通信学会NOLTA秋の学校「カオス現象論」, 2008
  Poster presentation
• Chaos synchronization in mutually coupled Josephson tetrodes　　　　　　　　　　　　　　　
  S. Yoshimori, A. Uchida, M. S. B. M. Sahri, N. F. B. Azmi
  2008 Dynamics Days Asia Pacific 5 (The Fifth International Conference on Nonlinear Science), 2008, [International conference]
  Poster presentation
• Experimental observation on fractal patterns of chaotic light scattering in regular-polyhedral mirror-ball structures　　　　　　　　　　　　　　　
  K. Amano, D. Narimatsu, S. Sotome, A. Uchida, and S. Yoshimori
  2008 Dynamics Days Asia Pacific 5 (The Fifth International Conference on Nonlinear Science), 2008, [International conference]
• Experimental and numerical analysis on common-chaotic-signal induced synchronization in semiconductor lasers with optical feedback　　　　　　　　　　　　　　　
  I. Oowada, H. Ariizumi, M. Li, A. Uchida, S. Yoshimori, K. Yoshimura, and P. Davis
  2008 Dynamics Days Asia Pacific 5 (The Fifth International Conference on Nonlinear Science), 2008, [International conference]
• Experiment on blind source separation of chaotic laser signals by independent component analysis　　　　　　　　　　　　　　　
  H. Tashiro, M. Kuraya, K. Hirano, A. Uchida, S. Yoshimori, and K. Umeno
  2008 Dynamics Days Asia Pacific 5 (The Fifth International Conference on Nonlinear Science), 2008, [International conference]
• Generation and synchronization of chaos in mutually-coupled vertical-cavity surface-emitting lasers with multiple time-delayed couplings　　　　　　　　　　　　　　　
  H. Someya, K. Tanaka, A. Uchida, and S. Yoshimori
  2008 Dynamics Days Asia Pacific 5 (The Fifth International Conference on Nonlinear Science), 2008, [International conference]
• 二つの時間遅延で相互結合された面発光レーザにおけるカオス発生とカオス同期の実験的観測　　　　　　　　　　　　　　　
  電子情報通信学会技術研究報告 非線形問題, 2008
• 非線形ダイナミカルシステムにおけるコンシステンシー　　　　　　　　　　　　　　　
  電子情報通信学会技術研究報告 非線形問題, 2008
• 独立成分分析を用いたレーザカオス混合信号の分離　　　　　　　　　　　　　　　
  電子情報通信学会非線形問題研究会, 2008
• 正多面体ミラー球構造体内における光散乱のフラクタル次元　　　　　　　　　　　　　　　
  電子情報通信学会非線形問題研究会, 2008
• 戻り光を有する半導体レーザにおける共通カオス信号入力による同期　　　　　　　　　　　　　　　
  電子情報通信学会非線形問題研究会, 2008
• Blind source separation of chaotic lasers by independent component analysis　　　　　　　　　　　　　　　
  M. Kuraya, H. Tashiro, A. Uchida, S. Yoshimori, K. Umeno
  First Solvay Workshop on Bits, Quanta, and Complex Systems: modern approaches to photonic information processing, 2008, [International conference]
  Poster presentation
• Analysis on fractal dimension of chaotic light scattering in regular-polyhedral mirror-ball structures　　　　　　　　　　　　　　　
  K. Amano, D. Narimatsu, S. Sotome, S. Tashiro, A. Uchida, and S. Yoshimori
  First Solvay Workshop on Bits, Quanta, and Complex Systems: modern approaches to photonic information processing, 2008, [International conference]
  Poster presentation
• Synchronization and consistency in chaotic lasers　　　　　　　　　　　　　　　
  A. Uchida
  2008, [International conference]