Numerical Analysis of Fiber Bragg Grating and Long Period Fiber Grating Undergoing Linear and Quadratic Temperature Change

作     者：袁银权 YUAN Yinquan,DING Liyun (Key Laboratory of Fiber Optic Sensing Technology and Information Processing (Ministry of Education),Wuhan University of Technology,Wuhan 430070,China)

作者机构：Key Laboratory of Fiber Optic Sensing Technology and Information Processing (Ministry of Education)Wuhan University of Technology 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2009年第24卷第6期

页      面：952-955页

核心收录：

学科分类：070207[理学-光学] 07[理学] 070601[理学-气象学] 0706[理学-大气科学] 0702[理学-物理学] 

基　　金：Funded by the Natural Science Foundation of Wuhan University of Technology (471-38650024) the National Natural Science Foundation of China (No. 50802069) 

主　　题：temperature gradient fiber Bragg grating long period fiber grating coupled- mode theory simulation 

摘      要：The coupled-mode equations for fiber Bragg grating （FBG） and long period fiber grating （LPFG） undergoing linear and quadratic temperature change were given. The effects of temperature gradient and quadratic temperature change on the reflectivity spectrum of fiber Braggs grating and the transmission spectrum of long period fiber grating were investigated using the numerical simulation, and the dependence relationships of the central wavelength shift, the full-width-athalf-maximum, and the peak intensity upon temperature gradient were also obtained. These relationships may be used to design a novel fiber optical sensor which can simultaneously measure the temperature and temperature gradient.