Aiming at the problems of limited bandwidth and periodicity of chaotic laser, a monolithically integrated chaotic semiconductor laser subject to random feedback and mutual injection is proposed. The chaotic laser consists of two distributed feedback laser diodes (DFB-LD), two semiconductor optical amplifiers (SOA) and a passive optical waveguide. Optical injection of two coupled DFB-LDs achieves chaotic signal shaping and bandwidth enhancement. Random grating along the passive waveguide provides stochastic feedback to suppress the time delay signature (TDS). A theoretical model is established based on the Lang-Kobayashi model to explore the dynamics of the proposed chaotic laser. A chaotic signal with TDS of 0.06 and bandwidth of 13.12 GHz is obtained by simulation. Furthermore, the effects of parameters including feedback ratio, mutual injection ratio, and detuning frequency on the TDS and bandwidth of chaotic signal are investigated. The results show that the broadband chaotic laser signal with TDS suppression can be obtained by controlling parameters reasonably.

中文翻译：

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随机反馈互注入的单片集成半导体激光器仿真

针对混沌激光器带宽和周期性有限的问题，提出了一种随机反馈互注入的单片集成混沌半导体激光器。混沌激光器由两个分布式反馈激光二极管（DFB-LD）、两个半导体光放大器（SOA）和一个无源光波导组成。两个耦合 DFB-LD 的光注入实现了混沌信号整形和带宽增强。沿无源波导的随机光栅提供随机反馈以抑制时间延迟特征 (TDS)。基于Lang-Kobayashi模型建立了一个理论模型来探索所提出的混沌激光器的动力学。通过仿真得到TDS为0.06、带宽为13.12 GHz的混沌信号。此外，包括反馈比在内的参数的影响，研究了互注入比和失谐频率对混沌信号的 TDS 和带宽的影响。结果表明，通过合理控制参数，可以获得具有TDS抑制的宽带混沌激光信号。