一种新型的基于互耦半导体激光器的双向混沌保密通信系统

基于互耦半导体激光器及其驱动的两个外部激光器,提出了一种新颖的双向激光混沌保密通信系统,数值研究了该系统的同步特性及双向通信性能.结果表明,该系统中两个互耦激光器的混沌输出始终处于非同步状态,无法实现信息的编译码；当编码激光器(系统中用于加载信息的激光器)与解码激光器(系统中用于解码信息的激光器)的参数一致时,每组编解码激光器能获得无延时的高质量混沌同步,并实现实时双向通信;当激光器内部参数失配时,这两组编解码激光器的同步性能及通信质量会受到一定的影响,但在一定的参数失配范围内,系统仍能实现较好的双向混沌通信.

A New Type of Bidirectional Chaotic Secure Communication System Based on Mutually Coupled Semiconductor Lasers

Based on the mutually coupled semiconductor lasers and two outer lasers driven by them,a new type of chaotic secure communication system is proposed,and the synchronization characteristics and bidirectional communication performances of such a system are numerically investigated.The results show that the chaos synchronization performance between the two mutually coupled lasers is poor and they can not realize communication.When the parameters of each pair of encoding laser(the laser for encoding in the communication system) and decoding laser(the laser for decoding in the communication)are well matched,high-quality chaos synchronization with zero lag time and simultaneous bidirectional communication can be realized,and when the inner parameters of the two lasers are mismatched,the synchronization quality and communication performance are affected to a certain extent,but the system possesses good robustness against mismatched parameters and can still realize bidirectional chaos communication within a certain mismatched parameter range.