Deformation of orbital angular momentum modes in bending ring-core fiber  

作　　者：严皓哲 李尚远 谢正洋 郑小平 杜城 张汉一 周炳琨 

机构地区：[1]Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering,Tsinghua University [2]Fiber Home Telecommunication Technologies Co., Ltd.

出　　处：《Chinese Optics Letters》2017年第3期55-59,共5页中国光学快报（英文版）

基　　金：supported in part by the National 973Program(No.2014CB340003);the National Nature Science Foundation of China(Nos.61307081,61621064,and 61420106003);the Chuangxin Funding

摘　　要：We present the investigation on deformation of orbital angular momentum （OAM） modes in bending ring-core fibers （RCFs） with different structure sizes through numerical and experimental studies. The effective refractive index differences of even and odd fiber eigenmodes, which constitute OAM±1,1 modes, induced by RCF bending and their impacts on the OAM±1,1 mode intensity distributions are analyzed. Bending experiments are also carried out on three different RCFs, and the results match well with simulation values. It is found that RCFs with smaller inner and outer radii show preferable tolerance to the fiber bending.We present the investigation on deformation of orbital angular momentum （OAM） modes in bending ring-core fibers （RCFs） with different structure sizes through numerical and experimental studies. The effective refractive index differences of even and odd fiber eigenmodes, which constitute OAM±1,1 modes, induced by RCF bending and their impacts on the OAM±1,1 mode intensity distributions are analyzed. Bending experiments are also carried out on three different RCFs, and the results match well with simulation values. It is found that RCFs with smaller inner and outer radii show preferable tolerance to the fiber bending.

关 键 词：Angular momentum DEFORMATION Fibers Refractive index 

分 类 号：TN253[电子电信—物理电子学]