基于频率失谐的光混沌同步开关的特性研究

Investigation on frequency-detuning induced optical chaos synchronization switching

针对实验报道的光混沌同步开关现象,建立了基于半导体激光器的光混沌同步开关的理论模型.利用该模型,数值模拟了不同外腔反馈强度和注入强度下的光混沌同步开关特性.结果表明:固定外腔反馈强度,不同注入强度下的混沌同步开关的对比度和宽度均不同;当注入强度与外腔反馈强度相同时,开关的对比度达到最大值;进一步地,当外腔反馈强度和注入强度同步增强时,混沌同步开关的对比度和宽度均单调增大.

A theoretical model characterizing a reported experiment on optical chaos synchronization switching is presented. Based on the model, the characteristics of optical chaos synchronization switching have been numerically simulated for different feedback strength and injection strength. The results show that： for a fixed feedback strength, both on-off switching ratio and width of the chaos switching will vary with the change of injection strength. When the injection strength equals to the feedback strength, the on-off switching ratio will reach a maximum. Furthermore, when the feedback strength and the injection strength are increased synchronously, both the on-off switching ratio and the width of the chaos switching will increase monotonicly.