Study on the spectral response of fiber Bragg grating sensor under non-uniform strain distribution in structural health monitoring  

作　　者：黄红梅 袁慎芳 

机构地区：[1]Aeronautical Science Key Laboratory for Smart Material and Structures, Nanjing University of Aeronautics & Astronautics

出　　处：《Optoelectronics Letters》2011年第2期109-112,共4页光电子快报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China (No.2007AA03Z117);the Key Program of National Natural Science Foundation of China (No.50830201)

摘　　要：Many theoretical studies have been developed to study the spectral response of a fiber Bragg grating (FBG) under non-uniform strain distribution along the length of FBG in recent years. However, almost no experiments were designed to obtain the evolution of the spectrum when a FBG is subjected to non-uniform strain. In this paper, the spectral responses of a FBG under non-uniform strain distributions are given and a numerical simulation based on the Runge-Kutta method is introduced to investigate the responses of the FBG under some typical non-uniform transverse strain fields, including both linear strain gradient and quadratic strain field. Experiment is carried out by using loads applied at different locations near the FBG. Good agreements between experimental results and numerical simulations are obtained.

关 键 词：Computer simulation EXPERIMENTS Fiber Bragg gratings Fiber optic components Fiber optic sensors Numerical methods Runge Kutta methods Structural health monitoring 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]