Study on Multiplexing Ability of Identical Fiber Bragg Gratings in a Single Fiber

作     者：LIU Jiansheng ZHANG Jing LI Xin ZHENG Zheng 

作者机构：School of Electronics and lnformation Engineering Beihang University Beijing 100191 China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2011年第24卷第5期

页      面：607-612页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0802[工学-机械工程] 0825[工学-航空宇航科学与技术] 0803[工学-光学工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Foundation item: National Natural Science Foundation of China (10376001) 

主　　题：Bragg gratings multiplexing low reflectivity multi-reflection interference effect 

摘      要：The multiplexing ability of a novel multiplexing fiber Bragg grating （FBG） method based on Optical Time Domain Reflecto meter （OTDR） and Time Division Multiplexing TDM technologies has been theoretically analyzed and studied. This method permits the interrogation of hundreds of identical FBGs with low reflectivity in a single fiber, making the FBG sensors more applicable in the aerospace health monitoring engineering. The analysis shows that the multiplexing ability can be greatly improved if the FBG reflectivity is sufficiently low. And hence, an inexpensive large-scale distributed sensing system based on this method can be realized, When evaluating the multiplexing ability of this system, we propose for the first time that the interference effect of multi-reflections among FBGs should be taken into consideration.