摘要
利用双光反馈半导体激光器作为混沌发射源,构建了一个单向开环混沌通信系统,并对系统的通信性能进行了相关仿真研究.研究表明:通过合理选取系统参量,双光反馈半导体激光器所产生的混沌载波能很好地抑制外腔延时特征;发射激光器和接收激光器在强注入锁定下能实现很好的混沌同步,并且同步性能对频率失谐具有很好的容忍性;采用附加混沌调制加密方式,500 Mbits/s的信号能够很好地隐藏于混沌载波中,并可在接收端成功解调.
Using a semiconductor laser with double optical feedback as a chaos transmitter,a unidirectional chaotic synchronization communication system is constructed,and the performances of such a system are investigated numerically.The results show that by selecting reasonable parameters,the time delay behaviour of chaotic carrier generated by the semiconductor laser with double optical feedback can be suppressed efficiently;through the strong injection from transmitter to receiver,the perfect synchronization between transmitter and receiver can be realized,and the synchronization quality has a high tolerance to frequency detuning between transmitted laser and received laser;under the additive chaos modulation encryption scheme,the 500 Mbits/s encoded message can be hidden efficiently in the chaotic carrier and successfully extracted at the receiver.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第1期213-217,共5页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60978003
61078003
611780011
11004161)
重庆市自然科学基金(批准号:2010BB9125)
西南大学中央高校基本科研业务费专项基金(批准号:XDJK2009B010
XDJK2010C021)资助的课题~~
关键词
半导体激光器
单向耦合
混沌通信
semiconductor laser
unidirectional coupling
chaotic communication
