Circular-side square microlasers with shifted output waveguide positions for mode and lasing spectrum control
Author(s): Zhang, YH (Zhang, Yong-Heng); Huang, YZ (Huang, Yong-Zhen); Ye, YQ (Ye, Ya-Qian); Yang, YD (Yang, Yue-De); Xiao, JL (Xiao, Jin-Long)
Source: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS Volume: 37 Issue: 5 Pages: 1312-1319 DOI: 10.1364/JOSAB.387662 Published: MAY 1 2020
Abstract: Circular-side square microlasers with shifted output waveguide positions are demonstrated to realize mode and lasing spectrum control. Numerical simulation results indicate that the mode Q factors of the fundamental, first-and second-order transverse modes are modulated, and the output coupling efficiency of the output waveguide can be greatly improved by introducing the translation of the output waveguide. Single-mode lasing, dual-mode lasing, and three-mode lasing are experimentally realized by changing the output waveguide positions. At the optimized shifted output waveguide position, a microlaser exhibits tunable single-mode behavior with a maximum output power of 120 mu W, a side-mode suppression ratio of 31 dB, and a linewidth of 42 MHz. Furthermore, the lasing characteristics of microlasers with different circular sides are compared. (C) 2020 Optical Society of America
Accession Number: WOS:000565310200009
ISSN: 0740-3224
eISSN: 1520-8540
Full Text: https://www.osapublishing.org/josab/abstract.cfm?uri=josab-37-5-1312