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首先研究了非相干光反馈同步系统内部参数失配对系统同步性能的影响,并与相干光反馈的完全同步系统以及广义同步系统进行了比较,其次研究了非相干光反馈采用三种不同的信号调制解调方式(CSK,CMS,ACM),对三种不同频率(250 MHz,2.5GHz和12.5GHz)的信号进行了调制解调。通过MATLAB仿真实验可知,非相干光反馈混沌同步系统相对于相干光反馈完全同步系统更易于实现,同时保留了一定的对参数失配的敏感特性,从而确保了该系统比相干光反馈广义同步具有更高的安全性;在信号解调时,CSK只能解调出250MHz信号,CMS能解调出2.5GHz信号,ACM能够解调出高达12.5GHz的信号。
Firstly, the influence of the internal parameter mismatch on the system synchronization performance of incoherent optical feedback synchronization system is studied. Compared with the complete synchronization system and the generalized synchronization system of coherent optical feedback, the nonlinear optical feedback system using three different signal modulation Demodulation method (CSK, CMS, ACM) to modulate and demodulate signals of three different frequencies (250 MHz, 2.5 GHz and 12.5 GHz). Through MATLAB simulation, it is found that the incoherent optical feedback chaotic synchronization system is easier to implement than the coherent optical feedback complete synchronization system, while retaining some sensitive characteristics to parameter mismatch, so as to ensure that the system has better performance than coherent optical feedback generalized synchronization Higher security; when demodulating signals, CSK can only demodulate 250MHz signals, CMS can demodulate 2.5GHz signals and ACM can demodulate signals up to 12.5GHz.