两种介质模型啁啾长周期光纤光栅的色散分析  

Analysis of dispersion properties of chirped long-period fiber grating based on two medium models

作　　者：王静怡[1] 白育堃[1,2] 孙宇伟[1] 张玥[1] 孟庆超[1] 

机构地区：[1]天津理工大学计算机与通信工程学院,天津300384 [2]天津大学激光与光电子研究所,天津300072

出　　处：《光通信研究》2015年第4期33-36,共4页Study on Optical Communications

基　　金：国家自然科学基金资助项目(11004152)

摘　　要：为了更加准确地研究薄包层CLPFG(啁啾长周期光纤光栅)的传输与色散特性,仿真分析了单轴晶体光纤的二、三层介质模型所得纤芯模有效折射率的差别以及中心波长的差别,并基于该差别,采用数值分析的方法研究不同包层半径、包层模序对CLPFG色散性能的影响。结果表明,当单轴晶体光纤包层半径与包层模序较小时,两种光纤介质模型的纤芯模有效折射率有较大差别。对于两种介质模型的光纤光栅,降低包层半径或增大包层模序数都有利于增大色散。文章的分析方法和结论为CLPFG的分析和设计提供了理论依据。For the purpose of accurately investigating the dispersion and transmission characteristics of thin-clad Chirped Long-Period Fiber Gratings (CLPFGs),this paper analyzes the differences of the effective Refractive Indices (RIs)and the center wavelengths in the core mode yielded from the two-and three-layered medium models of a uniaxial-crystal fiber.On the basis of these differences,it numerically analyses the effects of different cladding radii and cladding mode order on CLPFG dispersion properties.The results show that the core-mode effective RIs of the two fiber medium models differ significantly when the cladding radius and cladding mode order are small and for the fiber gratings of both models,either reducing the cladding radius or increasing the number of the cladding mode order is conducive to the increase of dispersion.The analytical method and con-clusions presented in this paper provide a theoretical basis for the analysis and design of CLPFG.

关 键 词：光纤光学 单轴晶体光纤介质模型 啁啾长周期光纤光栅 色散补偿 光谱 

分 类 号：TN929.11[电子电信—通信与信息系统]