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

作　　者：袁银权 

机构地区：[1]Key Laboratory of Fiber Optic Sensing Technology and Information Processing (Ministry of Education),Wuhan University of Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2009年第6期952-955,共4页武汉理工大学学报（材料科学英文版）

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

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.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.

关 键 词：temperature gradient fiber Bragg grating long period fiber grating coupled- mode theory simulation 

分 类 号：TN253[电子电信—物理电子学] P467[天文地球—大气科学及气象学]