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提出一种新颖的单片集成双微环耦合的双波长半导体激光器结构。集成于激光腔内的2个微环谐振腔作为模式选择滤波器,通过游标效应选择谐振模式,同时还可作为等效的反射镜面以形成行波腔。这种无需解理的行波激光腔代替了需要解理面的法布里-珀罗驻波腔。理论仿真表明,跟驻波腔结构相比,行波腔双微环激光器结构简单,可获得约34mA的较低的阈值电流和大于31dB的边模抑制比。合理地控制有源区的增益峰值和谐振模式分布,该激光器能提供一致性和稳定性较好的双波长激光输出。
A novel monolithic integrated dual-microring coupled dual-wavelength semiconductor laser structure is proposed. The two micro-ring resonators integrated in the laser cavity serve as the mode selection filter, and the resonant mode is selected through the vernier effect. At the same time, it can also be used as the equivalent mirror surface to form the traveling wave cavity. This unwrapping traveling wave laser cavity replaces the Fabry-Perot standing wave cavity that needs to be cleaved. The theoretical simulation shows that the TWT micro-ring laser has a simple structure compared with the standing wave cavity structure, and the low threshold current of about 34 mA and the side mode suppression ratio of more than 31 dB can be obtained. Reasonable control of the active peak gain and resonant mode distribution, the laser can provide better consistency and stability of the dual-wavelength laser output.