物理学报2012，Vol.61Issue(2)：275-281,7.
一种新型的双向长距离光纤混沌保密通信系统性能研究
A new type of bidirectional long distance optical fiber chaotic secure communication system
摘要
Abstract
Based on the chaotic synchronization of two response semiconductor lasers（RLs） under the injection from a common chaotic signal of a drive laser（DL）,a new type of secure communication system,which allows bidirectional and long-distance information transmissions,is proposed.A corresponding theoretical model is established to study the bidirectional transmission performance, security performance and the system performance under different transmission distances.The results show that when two RLs receive chaotic light injected from a DL,the chaotic outputs of two RLs achieve a fairly good isochronal synchronization without any time delay,while there is a big difference between the signals of RLs and the signal of DL;the system owns high security level after having analyzed the various ways from which eavesdropper may obtain message;if the ordinary single mode optical fiber is used as a transmission channel,the Q factor of decoded message can reach more than 6 after a propagation over 50km;if the dispersion-shifted fiber is employed,the Q factor of decoded message can still reach more than 6 after a propagation over 200km.关键词
半导体激光器/混沌同步/双向通信/光纤Key words
semiconductor laser/chaotic synchronization/bidirectional communication/optical fiber分类
信息技术与安全科学引用本文复制引用
刘宇然,吴正茂,吴加贵,李萍,夏光琼..一种新型的双向长距离光纤混沌保密通信系统性能研究[J].物理学报,2012,61(2):275-281,7.基金项目
国家自然科学基金 （）
重庆市自然科学基金 （）
西南大学中央高校基本科研业务费专项资金（批准号：XDJK2009B010,XDJK2010C021）资助的课题~~ （）
