We proposed and demonstrated 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). Compared to the case of injection the ECSL output into a discrete SL (ECSL-DSL), the proposed structure can achieve TDS suppression over a larger range of the injection. The different behaviors of the ECSL-TPA with four waveguide structures on the TDS are presented. The design and operating parameters of the waveguide structures are realistic for a wide range of edge- and surface-emitting lasers. The results show that the TDS suppression can be realized in a large region of parameters for the proposed scheme by setting appropriate waveguide structures and related parameters. To the best of our knowledge, this is the first time that a highly integrated two-element phased array is proposed for post-processing chaos generated by ECSL to achieve TDS suppression.

中文翻译：

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四种不同波导结构相控阵辅助的混沌时滞特征抑制


我们提出并演示了一种混沌生成方案，该方案通过将外腔半导体激光器（ECSL）的输出注入二元相控阵（ECSL-TPA）来隐藏时延特征（TDS）。与将ECSL输出注入离散SL（ECSL-DSL）的情况相比，所提出的结构可以在更大的注入范围内实现TDS抑制。介绍了具有四种波导结构的 ECSL-TPA 在 TDS 上的不同行为。波导结构的设计和操作参数对于各种边缘和表面发射激光器来说都是现实的。结果表明，通过设置合适的波导结构和相关参数，该方案可以在大参数范围内实现TDS抑制。据我们所知，这是首次提出一种高度集成的两元件相控阵来对ECSL产生的混沌进行后处理，以实现TDS抑制。