长周期光纤光栅的耦合特性及模拟分析  

Coupling Characteristics of Long- Period Fiber Grating and the Simulation Analysis

作　　者：李玉强[1] 周恒为[1] 

机构地区：[1]伊犁师范学院物理科学与技术学院,新疆伊宁835000

出　　处：《枣庄学院学报》2015年第2期17-23,共7页Journal of Zaozhuang University

基　　金：国家重点基础研究发展计划973项目(项目编号:2012CB821500);国家自然科学基金项目(项目编号:11464047);伊犁师范学院教改项目(项目编号:JG201209;JG201104)

摘　　要：本文基于三层光纤模型和耦合模理论,数值计算了弱导阶跃单模光纤中写入的非倾斜均匀长周期光纤光栅对透射谱的影响.计算结果表明:随着长周期光纤光栅周期数的增加,透射谱损耗峰峰值变大,带宽减小;随着折射率调制的增大,透射谱损耗峰峰值变大,带宽减小,损耗峰向长波方向漂移;随着光栅周期的增大,损耗峰向长波方向漂移.Numerical calculation on the influence of non uniform long- period fiber grating written by weakly guiding step single- mode fiber to the transmission spectrum was done based on three layers of fiber model and coupled mode theory in this article. The calculation results indicate that with the cycles of long period fiber grating increasing,the amplitudes of the loss peaks of transmission spectrum increase,but the bandwidth reduces; With the increment of modulation by the refractive index,the loss peak of transmission spectrum become larger,and meanwhile,bandwidth decreases,with the loss peaks shifting toward the longer wavelength; With the increasing of grating period,the loss peaks shift toward the long- wave direction.

关 键 词：长周期光纤光栅 耦合模理论 透射谱1 

分 类 号：TN253[电子电信—物理电子学]