Multi-wavelength injection locked semiconductor comb laser
Multi-wavelength injection locked semiconductor comb laser
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DOI：
10.1364/prj.455165
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发表时间：
2022-08-01
影响因子：
7.6
通讯作者：
Zhang, Jian-Jun
中科院分区：
文献类型：
--
作者：
Chen, Jia-Jian;Wei, Wen-Qi;Zhang, Jian-Jun
硅上的量子点激光器由于其作为片上硅光子光源的巨大潜力在过去十年中获得了极大的兴趣。在这里，我们演示了多波长注入锁定的InAs/GaAs量子点法布里-珀罗（FP）激光器的GaAs和硅衬底上的光自注入通过外腔。锁定的激光模式的数量可以通过调谐通过Lyot滤波器的反向注入光的波长相关的相位和模式间隔来从单个峰值调整到多个峰值。多波长注入锁定的激光模式表现出类似于20 kHz的平均光学线宽，这是从它们的自由运行条件缩小了约三个数量级。此外，通过外腔的多波长自注入锁定呈现平顶光谱特性，随着时间的推移稳定运行，大约有30个稳定锁定的通道，其中40分钟内频率失调小于700 MHz。特别是，在硅衬底上直接外延生长的FP激光器自注入锁定为平面-顶部梳状源，具有约25至700 GHz的可调谐自由光谱范围。报道的结果强调了多波长注入锁定激光器作为可调谐片上多波长光源的巨大潜力。(C)2022中国激光出版社
Quantum dot lasers on silicon have gained significant interest over the past decade due to their great potential as an on-chip silicon photonic light source. Here, we demonstrate multi-wavelength injection locking of InAs/GaAs quantum dot Fabry-Perot (FP) lasers both on GaAs and silicon substrates by optical self-injection via an external cavity. The number of locked laser modes can be adjusted from a single peak to multiple peaks by tuning wavelength dependent phase and mode spacing of back-injected light through a Lyot filter. The multi-wavelength injection locked laser modes exhibit average optical linewidth of similar to 20 kHz, which are narrowed by approximately three orders of magnitude from their free-running condition. Furthermore, multi-wavelength self-injection locking via an external cavity exhibits flat-top optical spectral properties with approximately 30 stably locked channels under stable operation over time, where the frequency detuning is less than 700 MHz within 40 min. Particularly, FP lasers by direct epitaxial growth on silicon substrates are self-injection locked as a flat-top comb source with tunable free spectral range from approximately 25 to 700 GHz. The reported results emphasize the great potential of multi-wavelength injection locked lasers as tunable on-chip multi-wavelength light sources. (C) 2022 Chinese Laser Press