Low-loss fiber grating coupler on thin film lithium niobate platform

被引：38

作者：

Chen, Bin ^{[1
]}

Ruan, Ziliang ^{[1
]}

Fan, Xuancong ^{[2
]}

Wang, Zong ^{[2
]}

Liu, Jie ^{[2
]}

Li, Chijun ^{[2
]}

Chen, Kaixuan ^{[2
,3
]}

Liu, Liu ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Opt Sci & Engn, Int Res Ctr Adv Photon, State Key Lab Modern Opt Instrumentat, Hangzhou 310058, Peoples R China

[2] South China Normal Univ, South China Acad Adv Optoelect, Ctr Opt & Electromagnet Res,Higher Educ Mega Ctr, Guangdong Prov Key Lab Opt Informat Mat & Techn, Sci Bldg 5, Guangzhou 510006, Peoples R China

[3] South China Normal Univ, Natl Ctr Int Res Green Optoelect, Guangzhou 510006, Peoples R China

来源：

APL PHOTONICS | 2022年 / 7卷 / 07期

基金：

中国国家自然科学基金;

关键词：

WAVE-GUIDE; EFFICIENCY; SILICON;

D O I：

10.1063/5.0093033

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A grating coupler with a high coupling efficiency and low back reflections is designed and demonstrated on the thin film lithium niobate platform, which facilitates an efficient interface between a lithium niobate ridge waveguide and a standard single mode fiber. The excellent performances of the present grating coupler are enabled by a cavity-assisted grating structure and a top metal mirror, even though a uniform grating is adopted as the diffractive element. Experimentally, a coupling loss of -0.89 dB at 1552 nm is demonstrated with a 1-dB bandwidth of 45 nm. Low back reflections of <-16.5 dB to the waveguide and <-13.7 dB to the fiber are also achieved from 1536 to 1579 nm. (c) 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

引用

页数：7

共 32 条

[1] Status and Potential of Lithium Niobate on Insulator (LNOI) for Photonic Integrated Circuits [J].