高双折射类椭圆纤芯光子晶体光纤设计与分析  

Design and analysis of high birefringence elliptical core photonic crystal fiber

作　　者：柳淘 郜洋 郭慧杰 张克非[2] LIU Tao;GAO Yang;GUO Huijie;ZHANG Kefei(School of Science,Southwest University of Science and Technology,Mianyang Sichuan 621010,China;School of Computer Science and Technology,Southwest University of Science and Technology,Mianyang Sichuan 621010,China)

机构地区：[1]西南科技大学理学院,四川绵阳621010 [2]西南科技大学计算机科学与技术学院,四川绵阳621010

出　　处：《光通信技术》2021年第4期48-53,共6页Optical Communication Technology

基　　金：西南科技大学校级重点教育教学改革与研究项目(19xnzd21)资助;四川省高等教育人才培养质量和教学改革基金(JG2018-507)资助;西南科技大学素质类教改专项(19szjg03)资助;四川省大学生创新创业训练基金(S202010619067)资助。

摘　　要：为了改善传统光纤灵敏度低、损耗高和非线性效应不易控制的问题,设计一种新型高双折射、低损耗和高非线性的类椭圆纤芯光子晶体光纤(PCF)结构。基于全矢量有限元法,通过COMSOL分析研究了光纤端面的空气孔直径和位置对双折射、限制损耗、模场特性和非线性等特性的影响。仿真结果表明:所设计的PCF结构在波长为1.550μm处的双折射率达1.918×10^(-3),x和y极化偏振方向的限制损耗分别为Lcx=1.6×10^(-3)dB/km和Lcy=8.0×10^(-4)dB/km,非线性系数达到9.4 km^(-1)W^(-1),且满足单模传输,实现了高质量、高精度的光信号传输与传感。In order to solve the problems of low sensitivity,high loss and difficult control of nonlinear effect of traditional fiber,a novel elliptical core like photonic crystal fiber(PCF)structure with high birefringence,low loss and high nonlinearity is designed.Based on the full vector finite element method,the effects of the size and position of the air hole on the birefringence,confinement loss,mode field characteristics and nonlinearity of the fiber end face are analyzed by COMSOL.The simulation results show that the birefringence index of the PCF is 1.918×10^(-3)at the wavelength of 1.550μm,the limiting loss of x and y polarization direction is Lcx=1.6×10^(-3)dB/km and Lcy=8.0×10^(-4)dB/km respectively,the nonlinear coefficient is 9.4 km^(-1)W^(-1),and the single-mode transmission is satisfied.The high-quality and high-precision optical signal transmission and sensing are realized.

关 键 词：光子晶体光纤 高双折射 全矢量有限元法 限制性损耗 

分 类 号：TN253[电子电信—物理电子学]