Article
Optics
Jiachen Bai, Hongxiang Wang, Yuefeng Ji
Summary: In this study, a novel electro-optic chaotic system with time-delay signature concealment is proposed and analyzed using multiple feedback nonlinear loops. The system introduces additional nonlinearity by implementing multiply feedback nonlinear loops, increasing complexity and improving permutation entropy. The system demonstrates high security and suitability for secure communication applications.
Article
Physics, Multidisciplinary
Yanqiang Guo, Tong Liu, Tong Zhao, Haojie Zhang, Xiaomin Guo
Summary: The study investigates TDS suppression and entropy growth enhancement of a chaotic optical-feedback semiconductor laser through frequency-band extracting. The results show that at the optimal extracting bandwidth, TDS is suppressed up to 96% compared to the original chaos, and entropy growth exceeds the noise-dominated threshold, providing a promising tool for extracting randomness for chaotic secure communication and random number generation.
Article
Optics
Xueting Zhang, Gang Guo, Xintian Liu, Guosi Hu, Kun Wang, Penghua Mu
Summary: In this paper, the dynamic behavior and time-delay concealment properties of mutually coupled nano-lasers in different structures were numerically investigated. The results show that adding feedback in the mutually coupled scheme can improve the quality of chaotic signals, and selecting appropriate parameters can achieve better time-delay concealment.
Article
Engineering, Electrical & Electronic
Qi Fang, Pei Zhou, Penghua Mu, Nianqiang Li
Summary: The proposed chaos generation scheme successfully conceals the time-delay signature (TDS) by injecting the output of an external-cavity semiconductor laser (ECSL) into a two-element phased array (ECSL-TPA). The ECSL-TPA allows for desired TDS suppression regardless of the waveguide structures considered, providing guidance for future design and optimization. Systematic study of key parameters reveals that appropriate settings are beneficial for TDS suppression and optimizing optical chaos, which can generate multiple independent chaotic signals with indistinguishable TDS in parallel for chaos-based applications.
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2021)
Article
Optics
Lucas Oliverio, Damien Rontani, Marc Sciamanna
Summary: We numerically investigate a time-delayed reservoir computer architecture based on a single-mode laser diode with optical injection and optical feedback, revealing unforeseen regions of high dynamic consistency through a high-resolution parametric analysis. Contrary to previous suggestions, we demonstrate that the best computing performance is not achieved at the edge of consistency in a coarser parametric analysis. The region of high consistency and optimal reservoir performances are highly sensitive to the data input modulation format.
Article
Engineering, Electrical & Electronic
Song-Sui Li, Xihua Zou, Liyue Zhang, Lin Jiang, Longsheng Wang, Anbang Wang, Wei Pan, Lianshan Yan
Summary: This study proposes and investigates the chaos generation from a semiconductor laser under band-rejection optical feedback, using numerical and experimental methods. The results show that the band-rejection feedback performs better in concealing the feedback delay time information compared to the conventional broadband mirror feedback.
IEEE PHOTONICS JOURNAL
(2022)
Article
Optics
Jianjun Chen, Xueli Mu, Linfu Li
Summary: The evolution characteristics of polarized chaos with time-delay signature (TDS) in a VCSEL scheme with variable-polarization optical injection (VPOI) were systematically investigated. It was found that VPOI significantly influences the TDS characteristics of polarized chaos in the S-VCSEL. The TDS evolution of polarization-resolved chaos in the S-VCSEL was elaborated through simulations of injection parameters.
Article
Optics
Bing Cui, Guangqiong Xia, Xi Tang, Yongbo Wang, Zhengmao Wu
Summary: In this study, a random bit sequence with a rate of 640 Gb/s is generated using a simple chaotic system and the CXOR post-processing method. The quality of the chaotic signal is improved by optimizing parameters, and the obtained random bit sequence passes all the NIST tests, indicating good randomness.
Article
Physics, Multidisciplinary
Da-Ming Wang, Yi-Hang Lei, Peng-Fei Shi, Zhuang-Ai Li
Summary: Optical chaos has been widely studied for its complex dynamics, but the time delay signature (TDS) caused by external cavity mode reduces its complexity. This study proposes and numerically demonstrates the critical dispersion of chirped fiber Bragg grating (CFBG) to eliminate the TDS of laser chaos. Results show that the TDS can be eliminated when the dispersion of CFBG is above the critical dispersion, providing important guidance for designing chaotic semiconductor lasers without TDS.
Review
Engineering, Electrical & Electronic
Xiaojing Wei, Lijun Qiao, Mengmeng Chai, Mingjiang Zhang
Summary: This article reviews the importance of chaotic laser generated by semiconductor lasers in areas of secure communication, random number generation, and optical sensing. It mainly focuses on the research progress in the performance improvement of chaotic laser, including bandwidth enhancement and time-delay signature suppression. Innovative methods for optimizing chaotic characteristics and the potential future applications of chaotic semiconductor lasers are also discussed.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Chao Kai, Pu Li, Bingjie Wang, K. Alan Shore, Yu Wen Qin, Yuncai Wang
Summary: The article proposes a single node-based photonic reservoir computing method for extracting the time delay signature of optical-feedback-induced chaos. By drawing the phase diagram of the chaotic time series and its delayed copies, the time delay signature is transformed into the shape feature of the obtained two-dimensional image. Numerical results show that the method can achieve an overall extraction accuracy rate of 97.3% for different optical feedback semiconductor lasers. The simplicity and good performance make this single node-based photonic reservoir computing a hardware-friendly solution for time delay signature extraction.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Optics
Hedwig Knoetig, Josephine Nauschuetz, Nikola Opacak, Sven Hoefling, Johannes Koeth, Robert Weih, Benedikt Schwarz
Summary: Through simulation and experimental research, a solution to overcome the performance limitations of interband cascade lasers has been identified, with resonant absorption playing a key role in improving the laser's characteristics. The study paves the way towards high-performance continuous-wave operation at wavelengths above 6 μm.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Chaojie Chen, Zhiwei Jia, Yuxiang Lv, Pu Li, Bingjie Xu, Yuncai Wang
Summary: This study introduces a method to generate broadband laser chaos using a QCL, showing evidence that the QCL can route to chaos through a quasi-periodic path with optical feedback. The influence of feedback intensity and bias current on chaos bandwidth is also investigated, revealing a significant bandwidth of 43.1 GHz due to the absence of relaxation oscillation phenomena in QCLs.
Article
Optics
XiaoYang Gong, Guoyang Zou, Hongxiang Wang, Yuefeng Ji, Yu Zhang
Summary: A new chaotic system based on logistic map post-processing is proposed to improve the output performance and solve the security problems. The system shows a flatter spectrum and extremely complex output. With the selection of reasonable parameters, key hiding can be achieved and the security of the system can be improved through the introduction of logistic parameters.
Article
Engineering, Electrical & Electronic
Fei Wang, Guangqiong Xia, Tao Deng, Jiagui Wu, Liuyuan Tao, Liang Peng, Zhengmao Wu
Summary: In this study, a wavelength tunable chaotic external cavity semiconductor laser composed of DFB-LD and CFBG is proposed and experimentally demonstrated for generating tunable chaos signals with time delay signature suppression. The experimental results show that the generated chaos possesses a low TDS and the effective bandwidth of the chaotic signal can be extended by increasing the bias current of the DFB-LD.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Nianqiang Li, Luciano Zunino, Alexandre Locquet, Byungchil Kim, Daeyoung Choi, Wei Pan, David S. Citrin
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2015)
Article
Engineering, Electrical & Electronic
Nianqiang Li, Wei Pan, Alexandre Locquet, V. N. Chizhevsky, David S. Citrin
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2015)
Article
Optics
Nianqiang Li, Wei Pan, A. Locquet, D. S. Citrin
Article
Computer Science, Information Systems
Nianqiang Li, Dimitris Alexandropoulos, Hadi Susanto, Ian Henning, Michael Adams
Article
Optics
Nianqiang Li, H. Susanto, B. Cemlyn, I. D. Henning, M. J. Adams
Article
Mathematics, Applied
Nianqiang Li, Wei Pan, Lianshan Yan, Bin Luo, Xihua Zou
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2014)
Article
Engineering, Electrical & Electronic
Nianqiang Li, Wei Pan, Shuiying Xiang, Qingchun Zhao, Liyue Zhang, Penghua Mu
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2014)
Article
Engineering, Electrical & Electronic
Nianqiang Li, Wei Pan, Lianshan Yan, Bin Luo, Xihua Zou, Shuiying Xiang
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2013)
Article
Engineering, Electrical & Electronic
Nianqiang Li, Wei Pan, Shuiying Xiang, Qingchun Zhao, Liyue Zhang
IEEE PHOTONICS TECHNOLOGY LETTERS
(2014)
Article
Optics
Nianqiang Li, Byungchil Kim, V. N. Chizhevsky, A. Locquet, M. Bloch, D. S. Citrin, Wei Pan
Article
Optics
Nianqiang Li, Byungchil Kim, A. Locquet, Daeyoung Choi, Wei Pan, D. S. Citrin
Article
Optics
Nianqiang Li, Wei Pan, Shuiying Xiang, Lianshan Yan, Bin Luo, Xihua Zou
Proceedings Paper
Engineering, Electrical & Electronic
Nianqiang Li, Dimitris Alexandropoulos, Hadi Susanto, Ian Henning, Michael Adams
Article
Optics
Nianqiang Li, H. Susanto, B. R. Cemlyn, I. D. Henning, M. J. Adams
Proceedings Paper
Engineering, Electrical & Electronic
Nianqiang Li, Byungchil Kim, Daeyoung Choi, V. N. Chizhevsky, A. Locquet, M. Bloch, D. S. Citrin, Wei Pan
SEMICONDUCTOR LASERS AND LASER DYNAMICS VI
(2014)