基于互耦合环形激光器获取高质量混沌信号

Research on high quality chaotic signal acquisition based on mutual coupled ring laser

为了满足混沌保密通信的需求,提出了一种基于两个半导体环形激光器互耦合产生高质量混沌光信号的方案,采用数值仿真的方法进行了理论分析,得到了各种参量情况下的时间序列、功率谱及自相关系数分布图。结果表明,在一定的参量条件下,激光器能展现出单周期、多周期及混沌等动力态;在较大的频率失谐下,混沌信号的时延特征能够被较好地抑制;通过大范围扫描注入参量,可得到带宽最大为14.0GHz并且具有较低的时延特征的混沌信号,能显著提高混沌保密通信的传输速率及安全性。此研究结果可为环形激光器在混沌保密通信中的应用提供一定的理论参考。

In order to meet the need of chaotic secure communication,a scheme of generating high quality chaotic optical signals by mutually coupled semiconductor ring lasers was proposed.The time series,power spectrum and autocorrelation coefficient distributions under various parameters were obtained by numerical simulation,and the theoretical analysis was carried out.The results show that under certain parameters,the laser can exhibit single-period,multi-period and chaotic dynamic states.In the case of large frequency detuning,the delay characteristics of chaos are well suppressed.By scanning injection parameters in a wide range,the chaotic signal with a maximum bandwidth of 14.0GHz and a low time delay signature can be obtained,which can significantly improve the transmission rate and security of chaotic secure communication.The results of this paper can provide some theoretical reference for the application of ring laser in chaotic secure communication.