摘要
为了通过遮挡法实现不同耦合系数π相移光纤光栅制作,分析了刻制过程中的相移形成原理,提出通过调整遮挡区长度和π相移周期次数控制π相移光纤光栅耦合系数的方法.采用传输矩阵法对刻制相移光纤光栅过程中的透射谱变化进行仿真计算,分析了不同光栅条纹可见度下遮挡区长度对相移光纤光栅透射谱的影响.基于不同遮挡区长度进行了相移光纤光栅制作实验,结果表明:通过调整遮挡区长度和π相移出现次数能够实现对相移光纤光栅耦合系数的有效控制.
In order to realize theπphase-shift fiber grating fabrication with different coupling coefficients by shielded method,the phase-shift principle is analyzed,and the method of controlling the coupling coefficient ofπphase-shifted fiber grating by regulating the length of shielded length and the number of occurrences ofπphase shift is proposed.The transmission matrix method is used to simulate the transmission spectrum change during the phase-shifted grating fabrication process.The influence of shielded length on the transmission spectrum of the phase-shifted fiber grating is analyzed under different grating fringe visibility.The phase-shifted fiber grating fabrication experiments are carried out based on different shielded length.The results show that the effective control of the phase-shift fiber grating coupling coefficient can be achieved by adjusting the shielded length and the number of phase shift cycles.
作者
姚高飞
黄俊斌
顾宏灿
刘文
YAO Gao-fei;HUANG Jun-bin;GU Hong-can;LIU Wen(School of Weapon Engineering,Naval University of Engineering,Wuhan 430033,China)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2019年第5期153-160,共8页
Acta Photonica Sinica
基金
"十三五"装备预研共用技术项目(No.41423030101)
湖北省自然科学基金(No.4251181109)~~
关键词
相移光纤光栅
耦合系数
遮挡法
分布反馈式光纤激光器
相位掩模板
Phase-shifted fiber grating
Coupling coefficient
Shielded method
Distributed feedback fiber laser
Phase mask
