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设计了一种新颖的快速可调谐激光器。这种激光器在恒定电流泵浦的有源微环组成的半导体环形激光器腔外部集成一个可调谐的无源微环反射器,其结构将决定激光器激射腔模的有源腔和无源可调谐部分分离,有助于提高调谐速度。与光栅结构的激光器相比,该激光器结构简单,具有强烈的选模功能,不需要相位匹配部分,输出波长不受调谐部分热效应的影响。基于多模速率方程建立了激光器的理论和数值模型,数值仿真结果表明该激光器能在选取的15个腔模范围内完成数字调谐,且具有的较低阈值电流和适中的边模抑制比。
A novel fast and tunable laser was designed. The laser integrates a tunable passive microrecyclic reflector outside of a constant-current-pumped, active microcyclic semiconductor ring laser cavity, the structure of which will determine the active cavity and the passive tunable laser lasing mode Partially separated, helps to improve tuning speed. Compared with a grating-structured laser, the laser has a simple structure, a strong mode selection function, does not require a phase matching part, and the output wavelength is not affected by the thermal effect of the tuning part. The theoretical and numerical models of the laser are established based on the multimode velocity equations. The numerical simulation results show that the laser can complete the digital tuning within 15 selected cavity modes with lower threshold current and moderate side mode rejection ratio.