Improved optical coupling based on a concave cavity lens fabricated by optical fiber facet etching

作     者：Kanglin Li Jiangbing Du Weihong Shen Jiacheng Liu Zuyuan He 李康林;杜江兵;沈微宏;刘嘉程;何祖源

作者机构：State Key Laboratory of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong UniversityShanghai 200240China 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2021年第19卷第5期

页      面：12-18页

核心收录：

学科分类：070207[理学-光学] 07[理学] 0702[理学-物理学] 

基　　金：the National Key R&D Program of China(No.2018YFB1801804) the National Natural Science Foundation of China(NSFC)(Nos.61935011,61875124,and 61675128) 

主　　题：fiber lens optical coupling 

摘      要：We report a low-fabrication-complexity and wideband fiber lens,which is formed by fiber facet etching and filling high refractive index UV *** optical field can be significantly shrunk by the facet lens so as to obtain improved optical *** simulations were carried out for different coupling conditions,on both fundamental mode and highorder mode,for a nine-mode *** fundamental mode area can be reduced from 152.17 to 12.57μm^(~2),and the coupling loss between the fiber lens and a photonic waveguide can be reduced to-2.9 d B with over 1000 nm 3 d B bandwidth.