A method for generating bandwidth-enhanced chaotic laser with time-delay signature suppression by a microring resonator is proposed and demonstrated experimentally. Through multiple beam interference effect and nonlinear effect within a microring resonator, chaotic laser generated by conventional optical feedback is optimized. A chaotic laser with the standard bandwidth of 26.5 GHz, the spectrum flatness of ±1.5 dB, and the time-delay signature value of 0.09 is obtained. The influence of the injection power and the frequency detuning on the optimized characteristics of chaotic laser are analyzed. The results show that chaotic laser with the standard bandwidth above 20 GHz and the spectrum flatness below ±3.5 dB can be achieved simultaneously in wide operating parameter regions. Furthermore, the effect of the radius of a microring resonator on the characteristics of the chaotic laser is investigated. The results show that a microring resonator can realize the performance optimization of chaotic laser. Due to the decreased loss, the time-delay signature suppression is better as the radius of a microring resonator increases. This scheme is simple and integration-compatible, which contributes to the development of an integrated, time-delay signature suppressed and broadband chaotic laser sources.

中文翻译：

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通过微环谐振器同时生成带宽增强和时滞特征抑制的混沌激光器


提出了一种利用微环谐振器产生具有时滞特征抑制的带宽增强混沌激光器的方法，并进行了实验演示。通过微环谐振腔内的多光束干涉效应和非线性效应，优化了常规光学反馈产生的混沌激光。该文得到了标准带宽为 26.5 GHz、光谱平坦度为 ±1.5 dB、时延特征值为 0.09 的混沌激光器。分析了注入功率和频率失谐对混沌激光器优化特性的影响。结果表明，在较宽的工作参数区域内，可以同时实现标准带宽高于 20 GHz 且光谱平坦度低于 ±3.5 dB 的混沌激光器。此外，研究了微环谐振器半径对混沌激光器特性的影响。结果表明，微环谐振器可以实现混沌激光器的性能优化。由于损耗减少，随着微环谐振器半径的增加，时滞特征抑制效果更好。该方案简单且集成兼容，有助于开发集成的、时滞特征抑制和宽带混沌激光源。