垂直腔面发射激光器的混沌同步恢复时间研究  

Research on Chaos Resynchronization Time of Vertical-Cavity Surface-Emitting Lasers

作　　者：吴梅 王龙生 王云才[1,3,4] 王安帮 Mei Wu;Longsheng Wang;Yuncai Wang;Anbang Wang(Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education(Taiyuan University of Technology),Taiyuan,Shanxi 030024,China;College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;School of Information Engineering,Guangdong University of Technology,Guangzhou,Guangdong 510006,China;Guangdong Provincial Key Laboratory of Photonics Information Technology,Guangzhou,Guangdong 510006,China)

机构地区：[1]新型传感器与智能控制教育部重点实验室(太原理工大学),山西太原030024 [2]太原理工大学物理与光电工程学院,山西太原030024 [3]广东工业大学信息工程学院,广东广州510006 [4]广东省光子学信息技术重点实验室,广东广州510006

出　　处：《激光与光电子学进展》2020年第21期134-141,共8页Laser & Optoelectronics Progress

基　　金：国家重点研发计划(2019YFB1803505);国家自然科学基金(61822509,61713014,61961136002,61805170,61805171);山西人才计划(201805D211027);山西“1331项目”重点创新研究团队、山西省高等学校优秀中青年创新人才计划和广东省创新创业团队计划。

摘　　要：利用半导体激光器的混沌同步有望实现高速物理随机密钥分发,然而激光器的混沌同步恢复时间限制密钥分发的速率。为此数值研究垂直腔面发射激光器(VCSEL)在开环注入锁定同步系统中,影响混沌同步恢复时间的因素。模拟结果表明,可以通过三种途径缩短混沌同步恢复时间,增加激光器的偏置电流、微分增益系数,或减小光子、载流子寿命来缩短弛豫振荡周期;减小线宽增强因子来减小激光混沌的复杂度;增加注入强度、减小频率失谐来实现强注入锁定。研究结果对提高基于混沌激光同步的密钥分发速率具有理论借鉴的意义。Chaos synchronization using semiconductor lasers achieves high-speed physical-layer key distribution,but the chaos synchronization time of lasers limits the rate of key distribution.Consequently,the factors affecting the chaos resynchronization time in an open-loop injection-locked synchronization system of the vertical-cavity surface-emitting laser(VCSEL)have been numerically studied.Moreover,the experimental results demonstrate that the chaos resynchronization time can be reduced in three ways:increasing the bias current of the laser and the differential gain coefficient,or reducing the photon and carrier lifetime to shorten the relaxation oscillation period;reducing the linewidth enhancement factor that can reduce the complexity of laser chaos;and increasing the injection intensity and reducing the frequency detuning,which can achieve strong injection locking.Based on chaos synchronization,the results have theoretical reference significance for improving the key distribution rate.

关 键 词：光通信 混沌保密通信 密钥分发 半导体激光器 混沌同步恢复时间 

分 类 号：TN929.11[电子电信—通信与信息系统]