Simultaneous unidirectional and bidirectional chaos-based optical communication using hybrid coupling semiconductor lasers  

作　　者：JIANG Ning PAN Wei LUO Bin YAN LianShan XIANG ShuiYing 

机构地区：[1]Center for Information Photonics and Communications, School of Information Science and Technology,Southwest Jiaotong University

出　　处：《Science China(Information Sciences)》2014年第1期276-286,共11页中国科学（信息科学）（英文版）

基　　金：supported by National Natural Science Foundation of China(Grant No.60976039);Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No.20070613058);Fundamental Research Foundation of Sichuan Province(Grant No.2011JY0030);Doctoral Innovation Talent Foundation of Southwest Jiaotong University(2009)

摘　　要：A simultaneous unidirectional and bidirectional chaos-based optical communication scheme based on a hybrid coupling semiconductor laser system that consists of one center semiconductor laser（CSL） and mul- tiple side semiconductor lasers（SSLs） is proposed numerically. In this scheme, the SSLs oriented in a linear chain mutually couple with the adjacent SSLs and they are subjected to identical unidirectional injections from the CSL which is a chaotic external cavity semiconductor laser. We theoretically analyze the conditions for diferent types of chaos synchronization based on the symmetry operation mechanism and injection-locking mechanism, and numerically investigate the influences of operation parameters, parameter mismatch robustness, chaos pass filtering efects and communication performance of the hybrid coupling semiconductor laser system. The simu- lation results demonstrate that with proper selection of the unidirectional and mutual coupling conditions, the SSLs can synchronize with each other isochronally and simultaneously synchronize to the CSL completely or laggardly, which enables the proposed system to achieve a unidirectional broadcasting communication from the CSL to the SSLs and a bidirectional communication among the SSLs simultaneously. The proposed scheme is beneficial to the implementation of optical chaos communication networks.A simultaneous unidirectional and bidirectional chaos-based optical communication scheme based on a hybrid coupling semiconductor laser system that consists of one center semiconductor laser（CSL） and mul- tiple side semiconductor lasers（SSLs） is proposed numerically. In this scheme, the SSLs oriented in a linear chain mutually couple with the adjacent SSLs and they are subjected to identical unidirectional injections from the CSL which is a chaotic external cavity semiconductor laser. We theoretically analyze the conditions for diferent types of chaos synchronization based on the symmetry operation mechanism and injection-locking mechanism, and numerically investigate the influences of operation parameters, parameter mismatch robustness, chaos pass filtering efects and communication performance of the hybrid coupling semiconductor laser system. The simu- lation results demonstrate that with proper selection of the unidirectional and mutual coupling conditions, the SSLs can synchronize with each other isochronally and simultaneously synchronize to the CSL completely or laggardly, which enables the proposed system to achieve a unidirectional broadcasting communication from the CSL to the SSLs and a bidirectional communication among the SSLs simultaneously. The proposed scheme is beneficial to the implementation of optical chaos communication networks.

关 键 词：semiconductor laser optical communication chaos synchronization chaos communication net-works hybrid coupling 

分 类 号：TN248.4[电子电信—物理电子学] O415.5[理学—理论物理]