Simultaneous Suppression of Time-Delay Signature in Intensity and Phase of Dual-Channel Chaos Communication
Simultaneous Suppression of Time-Delay Signature in Intensity and Phase of Dual-Channel Chaos Communication
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DOI：
10.1109/jqe.2015.2466176
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发表时间：
2015-08
影响因子：
2.5
通讯作者：
A. Elsonbaty;S. F. Hegazy;S. Obayya
中科院分区：
文献类型：
--
作者：
A. Elsonbaty;S. F. Hegazy;S. Obayya
本文提出了一种新的双通道光学混沌系统，该系统在所有观测量中同时抑制了时间延迟（TD）特性，即，在强度和相位上。一个单一的垂直腔面发射激光器（VCSEL）的混合光学和电光反馈的验证，以诱导同时TD抑制的偏振分辨成分的混沌输出。建立了一个全面的数学模型，将光延迟和电光延迟纳入VCSEL的速率方程中。利用自相关函数和延迟互信息检验了TD签名的抑制效果。结果表明，在峰值信号均值比技术所识别的参数空间的一定区域内，输出混沌信号在强度和相位上均能较好地消除TD特征。两个正交VCSEL模式的独立演化使得偏振分辨输出模式适合于增强的双通道混沌应用。据我们所知，这是第一次，一个双通道混沌通信系统的同时抑制TD功能在所有传输的可观的报告。
In this paper, we propose a novel dual-channel optical chaos system with a time-delay (TD) feature simultaneously suppressed in all observables, i.e., in both intensity and phase. A hybrid optical and electro-optic feedback for a single vertical-cavity surface-emitting laser (VCSEL) is verified to induce simultaneous TD suppression for the polarization-resolved components of the chaotic output. A comprehensive mathematical model is developed to incorporate the optical and electro-optic time delays into the rate equations of the VCSEL. The suppression of TD signature is then examined by means of autocorrelation function and delayed mutual information. The results show that the output chaotic signal has the TD feature well eliminated in both the intensity and phase over certain regions of parameter space identified using the peak signal to mean ratio technique. The independent evolution of the two orthogonal VCSEL modes renders the polarization-resolved output modes appropriate for the enhanced dual-channel chaos applications. To the best of our knowledge, this is the first time that a dual-channel chaos communication system is reported with simultaneous suppression of the TD feature in all the transmitted observables.