激光与光电子学进展, 2016, 53 (12): 121406, 网络出版: 2016-12-14
双光反馈双光注入混沌半导体激光器延时特征峰抑制
Time Delay Signature Concealment in Chaotic Semiconductor Lasers with Double Optical Feedback and Dual-Path Injection
激光技术 半导体激光器 混沌激光 双光注入 双光反馈 延时特性 laser technique semiconductor laser chaotic laser dual-path injection double optical feedback time delay signature
摘要
提出利用双光反馈(DOF)主半导体激光器(SL)双光注入(DPI)到从SL的方案来隐藏混沌激光光强和相位的延时特征峰, 利用自相关函数和互信息函数对不同方案下延时特征峰的抑制情况进行了对比分析。研究结果表明, 对同种类型的激光器, 在相同参数区间内, DOF-DPI方案与其他方案相比, 具有更好的抑制效果; 另外, 带混沌光注入的方案对相位延时特性的抑制要比对光强延时特性的抑制效果好; 在延时特征峰抑制到相同水平的前提下, DOF-DPI方案比其他方案具有更宽的参数区间。
Abstract
It is proposed that a slave semiconductor laser (SL) with dual-path injection (DPI) can be driven by a master SL with double optical feedback (DOF) to conceal the time delay signature from both intensity and phase chaos. With the usage of auto-correlation function (ACF) and mutual information (MI) function, the time delay signature concealment effects under different schemes are compared and analyzed. The research results indicate that, as for the same type of lasers with the same parameter ranges, the time delay signature can be better concealed with the DOF-DPI scheme than the other schemes. In addition, as for the scheme with chaotic light injection, the concealing effect of the phase time delay characteristic is better than that of the intensity time delay characteristic; on the same concealment level of time delay characteristic peaks, the DOF-DPI scheme has a wider parameter range than the other schemes.
孙巍阳, 张胜海, 吴天安, 张晓旭. 双光反馈双光注入混沌半导体激光器延时特征峰抑制[J]. 激光与光电子学进展, 2016, 53(12): 121406. Sun Weiyang, Zhang Shenghai, Wu Tian′an, Zhang Xiaoxu. Time Delay Signature Concealment in Chaotic Semiconductor Lasers with Double Optical Feedback and Dual-Path Injection[J]. Laser & Optoelectronics Progress, 2016, 53(12): 121406.
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