中国激光, 2018, 45 (1): 0106001, 网络出版: 2018-01-24
安全性增强的双向长距离混沌保密通信 下载: 1113次
Security-Enhanced Bidirectional Long-Distance Chaos Secure Communication
光通信 半导体激光器 混沌保密通信 混沌同步 双向传输 光纤 optical communications semiconductor laser chaos secure communication chaos synchronization bidirectional transmission fiber
摘要
基于混沌同步, 构建安全性增强的双向长距离混沌保密通信系统。结果表明:在合适的双混沌光注入参数下, 驱动激光器(DL)可以产生低时延特征(TDS)、宽带宽的混沌信号; DL输出的混沌信号注入到2个响应激光器(RLs)中, 通过优化注入参数, 2个RLs可输出TDS更低、带宽更宽的混沌信号, 且2个混沌信号在实现高质量混沌同步的同时与DL输出混沌保持极低的相关系数(小于0.1); 基于2个RLs之间高质量的混沌同步, 可实现安全性增强的双向远距离混沌保密通信。采用色散位移光纤作为传输信道, 20 Gbit/s的信息在传输120 km后, 解调信息的Q因子大于6; 而采用普通单模光纤作为传输信道, 1 Gbit/s的信息在传输140 km后, 解调信息的Q因子大于8。
Abstract
Based on the chaos synchronization, a security-enhanced bidirectional long-distance chaos secure communication system is proposed. The results show that, under suitable parameters of dual-path injection conditions, low time-delay signature (TDS) and broadband chaotic signals can be generated from driving laser (DL). The chaos signals from DL are injected into two response lasers (RLs). By optimization of injection strength and detuning frequency, the optimized chaos signals with lower TDS and wider bandwidth can be generated and high-quality chaos synchronization between two RLs can be obtained. Meanwhile, the maximal synchronization coefficient between DL and RLs is lower than 0.1. Based on the high-quality chaos synchronization between two RLs, a security-enhanced bidirectional long-distance chaos communication can be achieved. Q factor of 20 Gbit/s decoded messages is more than 6 after a propagation over 120 km under dispersion shifted fiber used as channel, and Q factor of 1 Gbit/s decoded messages is more than 8 after a propagation over 140 km under normal single-mode fiber used as channel.
李琼, 邓涛, 吴正茂, 徐攀, 夏光琼. 安全性增强的双向长距离混沌保密通信[J]. 中国激光, 2018, 45(1): 0106001. Li Qiong, Deng Tao, Wu Zhengmao, Xu Pan, Xia Guangqiong. Security-Enhanced Bidirectional Long-Distance Chaos Secure Communication[J]. Chinese Journal of Lasers, 2018, 45(1): 0106001.