Global modes and coupled modes for integrated twin circular-side octagon microlasers

被引：0
作者：
Ke Yang
Yuede Yang
Youzeng Hao
Jiliang Wu
Yongtao Huang
Jiachen Liu
Jinlong Xiao
Yongzhen Huang
机构：
[1] Chinese Academy of Sciences,State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors
[2] University of Chinese Academy of Sciences,Center of Materials Science and Optoelectronics Engineering
来源：
Science China Information Sciences | 2022年 / 65卷
关键词：
optical microcavity; semiconductor lasers; coupled cavity; lasing mode control; photonic integration;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Whispering-gallery mode (WGM) microlasers are potential light sources for photonic integrated circuits and optical information processing. In this paper, an integrated twin circular-side octagon microlaser (TCOM) composed of two identical circular-side octagon microcavities (COMs) is proposed and demonstrated for realizing lasing mode control. In a TCOM, we found a global mode with the mode field of an “8” pattern (labeled “8” mode) in addition to weak coupling modes of traditional four-bounce modes. The “8” mode belongs to the whole coupled cavity and is insensitive to the refractive index offset of coupled COMs, but the weak coupling modes are strongly sensitive to the refractive index offset. Lasing mode transformation from multiple coupled modes to a single “8” mode is demonstrated by adjusting the refractive index offset through injection currents. Weak coupling modes for directly connected TCOMs and lasing mode control make the COM a potential unit for large-scale photonic integration and optical information processing.
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