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利用半导体激光器和马赫-曾德尔调制器构建了一个基于双光电反馈振荡器的单向混沌同步通信系统,数值研究了该系统的同步特性及通信性能。结果表明,系统输出的混沌波具有更宽的频带和更为复杂的频谱,有利于提高通信容量和系统的安全性;当系统无参数失配时,能获得高质量混沌同步,并能实现实时通信;参数失配对系统同步性能和通信质量有影响,但在一定的参数失配范围内,系统仍能实现较好的混沌通信。
A one-way chaotic synchronization communication system based on dual optoelectronic feedback oscillator is constructed by using semiconductor laser and Mach-Zehnder modulator. The synchronization characteristics and communication performance of the system are numerically studied. The results show that the chaotic wave output by the system has a wider frequency band and more complex frequency spectrum, which is beneficial to improve the communication capacity and system security. When the system has no parameter mismatch, it can obtain high quality chaos synchronization and achieve real-time Communication. Parameter mismatch has an impact on system synchronization performance and communication quality. However, the system can still achieve better chaotic communication within a certain parameter mismatch.