Time-delay signature characteristics of the chaotic output from an optoelectronic oscillator by introducing an optical feedback
Time-delay signature characteristics of the chaotic output from an optoelectronic oscillator by introducing an optical feedback
复制标题
通过引入光反馈来实现光电振荡器混沌输出的时滞特征
DOI：
10.1007/s12200-019-0960-z
复制
发表时间：
2020
影响因子：
5.4
通讯作者：
Guangqiong Xia
中科院分区：
文献类型：
--
作者：
Xixuan Liu;Xi Tang;Zhengmao Wu;Guangqiong Xia
利用自相关函数（ACF）和排列熵（PE）方法，数值研究了引入光反馈环后，光电振荡器（OEO）输出混沌信号的时延特性。结果表明，对于这样的混沌系统，延迟时间为T1的光电反馈和延迟时间为T2的光反馈都对混沌的TDS有贡献.混沌信号的TDS应在包括T1和T2的大时间窗内通过混沌信号ACF曲线上的最强峰来评估，最强峰可能位于T1或T2附近。通过映射TDS在光反馈强度和时间的参数空间中的演化，可以确定用于实现具有相对较弱TDS的混沌信号的某些优化参数区域。
In this work, via autocorrelation function (ACF) and permutation entropy (PE) methods, we numerically investigate the time-delay signature (TDS) characteristics of the chaotic signal output from an optoelectronic oscillator (OEO) after introducing an extra optical feedback loop. The results demonstrate that, for such a chaotic system, both the optoelectronic feedback with a delay time ofT1and the optical feedback with a delay time ofT2contribute to the TDS of generated chaos. The TDS of the chaotic signal should be evaluated within a large time window includingT1andT2by the strongest peak in the ACF curve of the chaotic signal, and the strongest peak may locate at nearT1orT2. Through mapping the evolution of the TDS in the parameter space of the optical feedback strength and time, certain optimized parameter regions for achieving a chaotic signal with a relatively weak TDS can be determined.