• Acta Photonica Sinica
  • Vol. 51, Issue 4, 0406005 (2022)
Dongzhou ZHONG*, Zhe XU, Keke ZHAO, Yalan HU, Wanan DENG, Peng HOU, and Jinbo ZHANG
Author Affiliations
  • Intelligent Manufacturing Faculty,Wuyi University,Jiangmen,Guangdong 529020,China
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    DOI: 10.3788/gzxb20225104.0406005 Cite this Article
    Dongzhou ZHONG, Zhe XU, Keke ZHAO, Yalan HU, Wanan DENG, Peng HOU, Jinbo ZHANG. Exploring of Chaotic Secure Communications with High-speed Using Optical Reservoir Computers[J]. Acta Photonica Sinica, 2022, 51(4): 0406005 Copy Citation Text show less

    Abstract

    Optically pumped spin-polarized vertical-cavity surface-emitting lasers might provide properties superior to electrically pumped vertical-cavity surface-emitting lasers, such as faster modulation dynamics, lager modulation bandwidth, lower threshold, and stronger polarization determination. New applications of optically pumped spin-vertical-cavity surface-emitting lasers are foreseen in high-speed optical communication, optical information processing, data storage, quantum computing and biochemical sensing. Various forms of ultrafast instability are observed in optically pumped spin-vertical-cavity surface-emitting lasers, including periodic oscillations, polarization switching, and chaos dynamics. Due to weak material and cavity anisotropy, the output of electrically pumped vertical-cavity surface-emitting laser usually includes two orthogonal polarization components, which is beneficial to realize dual channel optical communication. Therefore, the dual-channel secure communications based on electrically pumped vertical-cavity surface-emitting lasers have received extensive attention in recent years. In most of these examples, the drive-response electrically-pumped vertical-cavity surface-emitting lasers system was always used for secure communications. In such a system, chaotic x-polarization component and y-polarization component were yielded via the introduction of the external perturbations, typically feedback in the drive vertical-cavity surface-emitting laser. The response vertical-cavity surface-emitting laser yielded similar chaotic x-polarization component and y-polarization component when its parameters were identical to those of the drive vertical-cavity surface-emitting laser. Moreover, chaos synchronization between each pair of polarization components played a key role in security and encrypted message recovery. However, the realization of high-quality chaos synchronizations relies on the assumptions that the drive and response electrically pumped vertical-cavity surface-emitting lasers are completely symmetrical in structure, and their parameters match perfectly. In addition, previous works showed that due to the existence of two polarization components in drive and response vertical-cavity surface-emitting lasers, the structural symmetry of these two lasers is broken, which leads to the degradation of the quality of chaos synchronization. Under this asymmetric structure, high-quality chaos synchronization can be received by limiting a certain delay difference between the self-feedback delay of the drive vertical-cavity surface-emitting laser and the channel delay. The assumptions and limits as described above do not hold in practice. Realization of high-quality chaos synchronization will meet much more challenges in practice due to the inevitable imperfect match between the driving and response vertical-cavity surface-emitting lasers, and the variation of the delay difference at any time.Optically-pumped spin-vertical-cavity surface-emitting laser has better controllability for polarization switch, which is conducive to the realization of two parallel reservoir computers. Moreover, it can yield ultrafast chaotic dynamic without feedback or subject to short feedback delay, thus forming very short spacing between two virtual nodes under sufficient nodes, denoting two reservoir computers using two chaotic polarization components of optically-pumped spin-vertical-cavity surface-emitting laser can deal with two high-speed chaotic time-series in parallel data. In this work, we utilize two parallel reservoir computers using the two polarization components of an optically pumped spin-vertical-cavity surface-emitting laser with both optical feedback and optical injection, to model the chaotic dynamics of the output two polarization components from another optically pumped spin-vertical-cavity surface-emitting lasers as a transmitter. High-quality chaotic synchronization between a transmitting polarization component and its corresponding trained reservoir can be realized by training vertical-cavity surface-emitting laser-based reservoir. Under such a synchronization condition, we demonstrate the successful dual-channel secure communications with 16QAM messages under guaranteeing their securities. We further discuss the bit error ratio performances for two decoded messages under different parameters. We demonstrate that all bit error ratio via different parameters keep at 0. Our findings show that a delay-based optical reservoir computing provides an effective method for the practical application of optical secure communication.
    Dongzhou ZHONG, Zhe XU, Keke ZHAO, Yalan HU, Wanan DENG, Peng HOU, Jinbo ZHANG. Exploring of Chaotic Secure Communications with High-speed Using Optical Reservoir Computers[J]. Acta Photonica Sinica, 2022, 51(4): 0406005
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