物理学报Issue(15)：1-11,11.DOI:10.7498/aps.64.154205
基于半导体环形激光器的高速双向双信道混沌保密通信∗
High sp eed bidirectional dual-channel chaos secure communication based on semiconductor ring lasers
摘要
Abstract
Chaos is a fascinating phenomenon of nonlinear dynamical systems, and optical chaos communication has been one of potential frontier techniques to implement secure transmission of information. In this paper a novel high-speed bidirectional dual-channel chaos secure communication system is proposed based on semiconductor ring lasers (SRLs). In this system, the time delay signatures in chaotic output of clockwise (CW) and counterclockwise (CCW) patterns from a driving SRL (D-SRL) are firstly suppressed by using the double optical cross-feedback frame. Then, the chaotic output of D-SRL is injected into two response SRLs (R-SRLs) to drive the corresponding CW and CCW patterns of R-SRLs that are synchronized and bandwidth enhanced simultaneously. Thus, a bidirectional dual-channel chaos communication could be built based on chaotic synchronization of the two R-SRLs. We theoretically investigated the chaotic characteristics of a D-SRL under double optical cross-feedback and the chaotic synchronization features between R-SRL1 and R-SRL2 under different driving conditions. Results show that the time delay signatures of CW and CCW patterns of D-SRL could be effectively hidden under proper feedback conditions. The bandwidths of CW and CCW patterns of the D-SRL could be enhanced significantly. Furthermore, high-quality isochronous synchronization between R-SRL1 and R-SRL2 can be realized by choosing appropriate injection strength and detuning frequency in D-SRL and R-SRLs. Finally, the communication performances of bidirectional dual-channel chaos secure communication based on this proposed system are preliminarily examined and discussed, and the simulated results demonstrate that for 10 Gbit/s message, the Q factor of decoded message could be maintained above 6 after 10 kilometers distance transmission.关键词
半导体环形激光器/混沌保密通信/双信道/双向Key words
semiconductor ring lasers/chaos secure communication/dual-channel/bidirectional引用本文复制引用
王顺天,吴正茂,吴加贵,周立,夏光琼..基于半导体环形激光器的高速双向双信道混沌保密通信∗[J].物理学报,2015,(15):1-11,11.基金项目
国家自然科学基金(批准号:61178011,61275116,61475127,11474233)、重庆市高等学校青年骨干教师资助计划(批准号:102060-20600512)和西南大学中央高校基本科研业务费专项基金(批准号：XDJK2013B037, XDJK2014C079, SWU114004)资助的课题.@@@@* Project supported by the National Natural Science Foundation of China, china (Grant Nos.61178011,61275116,61475127,11474233), the Foundation of Chongqing College Key Yung Teachers, China (Grant No.102060-20600512), and the Fundamental Research Funds for the Central Universities of Southwest university, China (Grant Nos. XDJK2013B037, XDJK2014C079, SWU114004) （批准号:61178011,61275116,61475127,11474233）
