Robust hybrid laser linewidth reduction using Si3N4-based subwavelength hole defect assisted microring reflector

被引：25

作者：

Li, Jiachen ^{[1
,2
]}

Zhang, Baoyu ^{[1
,2
]}

Yang, Sigang ^{[1
,2
]}

Chen, Hongwei ^{[1
,2
]}

Chen, Minghua ^{[1
,2
]}

机构：

[1] Beijing Natl Res Ctr Informat Sci & Technol BNRis, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China

来源：

PHOTONICS RESEARCH | 2021年 / 9卷 / 04期

基金：

中国国家自然科学基金;

关键词：

TRANSMISSION;

D O I：

10.1364/PRJ.412284

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a hybrid laser with a low intrinsic linewidth of 34.2 Hz and a high fiber-coupled output power of 11.7 dBm, by coupling a Si3N4-based subwavelength hole defect assisted microring reflector (SHDA-MRR) to a commercially available distributed feedback semiconductor laser. The proposed SHDA-MRR structure features an accurately controlled reflection response, with the manipulated modal coupling between two degenerate counterpropagating modes induced by a subwavelength hole defect embedded in the microring waveguide. With further joint optimization of cavity parameters, this Si3N4 SHDA-MRR structure is expected to reduce the laser intrinsic linewidth to a sub-hertz level. This work explores a low-cost and robust linewidth reduction scheme for the applications of high-speed coherent optical communications systems and high-resolution optical metrology. (C) 2021 Chinese Laser Press.

引用

页码：558 / 566

页数：9