Wu Jia-Gui, Wu Zheng-Mao, Xia Guang-Qiong, Feng Guo-Ying
School of Physics, Southwest University, Chongqing, China.
Opt Express. 2012 Jan 16;20(2):1741-53. doi: 10.1364/OE.20.001741.
In this paper, evolution of time delay (TD) signature of chaos generated in a mutual delay-coupled semiconductor lasers (MDC-SLs) system is investigated experimentally and theoretically. Two statistical methods, including self-correlation function (SF) and permutation entropy (PE), are used to estimate the TD signature of chaotic time series. Through extracting the characteristic peak from the SF curve, a series of TD signature evolution maps are firstly obtained in the parameter space of coupled strength and frequency detuning. Meantime, the influences of injection current on the evolution maps of TD signature have been discussed, and the optimum scope of TD signature suppression is also specified. An overall qualitative agreement between our theoretical and experimental results is obtained.
本文对相互延迟耦合半导体激光器（MDC-SLs）系统中产生的混沌的时间延迟（TD）特征的演化进行了实验和理论研究。采用自相关函数（SF）和排列熵（PE）两种统计方法来估计混沌时间序列的TD特征。通过从SF曲线中提取特征峰，首先在耦合强度和频率失谐的参数空间中获得了一系列TD特征演化图。同时，讨论了注入电流对TD特征演化图的影响，并确定了TD特征抑制的最佳范围。理论结果与实验结果总体上定性一致。
