Single-mode lasing in an AlGaInAs/InP dual-port square microresonator

作者：Ke Yang, You-Ling Chen, Ting Wang, Jiachen Liu, Yingrun Fan, Yue‐De Yang, Jin‐Long Xiao, Yong‐Zhen Huang · 发表于：Optics Letters · 年份：2022 · DOI：10.1364/ol.461304 · 被引用次数：9 · 研究领域：Photonic and Optical Devices、Advanced Fiber Laser Technologies、Mechanical and Optical Resonators

Mode selection is crucial to achieving stable single-mode lasing in microlasers. Here, we demonstrate experimentally a dual-port square microresonator for single-mode lasing with a side-mode-suppression ratio (SMSR) exceeding 40 dB. By connecting waveguides at two opposite vertices, the quality factor for the antisymmetric mode (ASM) is much higher than that of the symmetric mode (SM), enabling single-mode lasing. Furthermore, far-field interference patterns similar to Young's two-slit interference are observed. This microlaser is capable of providing two optical sources simultaneously for optical signal processing in high-density integrated photonic circuits.