Abstract

The use of a thin, low-index liner layer over a surface grating covered by a high-index cover layer in a III-V alloy waveguide significantly improves the coupling efficiency of grating couplers, and therefore, reduces the length of such couplers by an order of magnitude. The same low-index liner and high-index cover layer can also reduce losses between transition sections of photonic integrated circuits or between a laser region and a distributed Bragg reflector or grating coupler region.

© 2017 OAPA

Hybrid III–V/silicon laser with laterally coupled Bragg grating

Yu-Lian Cao, Xiao-Nan Hu, Xian-Shu Luo, Jun-Feng Song, Yuanbing Cheng, Cheng-Ming Li, Chong-Yang Liu, Hong Wang, Liow Tsung-Yang, Guo-Qiang Lo, and QiJie Wang
Opt. Express 23(7) 8800-8808 (2015)

Compact light couplers for lateral III–V membrane devices grown on SOI platforms

Zhaojie Ren and Yu Han
Opt. Lett. 49(10) 2685-2688 (2024)

Ultracompact tapered coupler for the Si/III–V heterogeneous integration

Qiangsheng Huang, Jianxin Cheng, Liu Liu, Yongbo Tang, and Sailing He
Appl. Opt. 54(14) 4327-4332 (2015)

High coupling efficiency waveguide grating couplers on lithium niobate

Xuetong Zhou, Ying Xue, Fan Ye, Ziyao Feng, Yuan Li, Xiankai Sun, Kei May Lau, and Hon Ki Tsang
Opt. Lett. 48(12) 3267-3270 (2023)

Membrane buried-heterostructure DFB laser with an optically coupled III-V/Si waveguide

Takuma Aihara, Tatsurou Hiraki, Koji Takeda, Takuro Fujii, Takaaki Kakitsuka, Tai Tsuchizawa, and Shinji Matsuo
Opt. Express 27(25) 36438-36448 (2019)