A Self-Injection Locked Laser Based on High- Q Micro-Ring Resonator With Adjustable Feedback

作者：Qingshuai Su, Fang Wei, Chen Chen, Zujie Fang, Haoyang Pi, Yanguang Sun, Fenghe Yang, Anton Stroganov, Huimin Wu, Guofeng Xin, Xiao Chen, Fei Yang, Qing Ye, Haiwen Cai, Weibiao Chen · 发表于：Journal of Lightwave Technology · 年份：2023 · DOI：10.1109/jlt.2023.3291753 · 被引用次数：47 · 研究领域：Photonic and Optical Devices、Advanced Fiber Laser Technologies、Advanced Fiber Optic Sensors

We propose a hybrid integrated self-injection locked (SIL) narrow linewidth laser with adjustable feedback intensity. An adjustable Sagnac loop reflector (ASLR) coupled to a high-Qmicro-ring resonator is introduced to adjust and optimize the optical feedback intensity of the SIL laser. The experimental results show that the linewidth and tuning performance of the SIL laser are closely related to the optical feedback intensity. After optimizing the reflectivity of ASLR, more excellent frequency noise suppression capability and larger locking range can be obtained compared with the conventional SIL lasers with fixed feedback intensity. The intrinsic linewidth is reduced to 60 Hz, and the locking range without phase compensation is extended to 6.3 GHz. This work has important application value in the field of coherent detection and precision metrology.