Chaos Time Delay Signature Suppression Assisted by a Phased Array With Four Different Waveguide Structures
Chaos Time Delay Signature Suppression Assisted by a Phased Array With Four Different Waveguide Structures
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DOI：
10.1109/jqe.2021.3070576
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发表时间：
2021-06
影响因子：
2.5
通讯作者：
Q. Fang;Pei Zhou;Penghua Mu;Nianqiang Li
中科院分区：
文献类型：
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作者：
Q. Fang;Pei Zhou;Penghua Mu;Nianqiang Li
我们提出并证明了一种混沌产生方案，该方案通过将外腔半导体激光器（ECSL）的输出注入到二元相控阵（ECSL-TPA）中来隐藏时间延迟签名（TDS）。我们考虑了ECSL输出具有明显TDS的情况，并评估了具有四种波导结构的ECSL-TPA在TDS抑制方面的性能。数值结果表明，ECSL-TPA允许所需的TDS抑制在宽的参数空间，无论考虑的波导结构。然而，不同的TDS行为存在这些结构，这为未来的设计和优化建议ECSL-TPA提供指导。系统地研究了注入速率、频率失谐量、激光分离比、抽运速率、线宽增强因子和频率偏移量等关键参数对TDS的影响。这些关键参数的适当设置有利于抑制TDS，从而优化光学混沌。相控阵可以扩展到包括大量的元素，从而产生多个独立的混沌信号与不可区分的TDS并行，支付的方式为基于混沌的应用程序，需要独立的，高质量的混沌同时。
We propose and demonstrate a chaos generation scheme that conceals the time-delay signature (TDS) by injecting the output of an external-cavity semiconductor laser (ECSL) into a two-element phased array (ECSL-TPA). We consider the case of the ECSL output with obvious TDS, and evaluate the performance of the ECSL-TPA with four waveguide structures in TDS suppression. The numerical results demonstrate that the ECSL-TPA allows for desired TDS suppression in wide parameter space regardless of the waveguide structures considered. However, different TDS behavior exists for these structures, which provides guidance for future design and optimization of the proposed ECSL-TPA. Additionally, the influence of some key parameters including the injection rate, frequency detuning, laser separation ratio, pump rate, linewidth enhancement factor, and frequency offset on TDS is systematically studied. Appropriate settings of these key parameters are beneficial for TDS suppression and thus optimizing optical chaos. The phased array can be extended to include a large number of elements and thus generates multiple independent chaotic signals with indistinguishable TDS in parallel, paying the way for chaos-based applications that require independent, high-quality chaos simultaneously.