Slope-Assisted Brillouin-Based Distributed Fiber-Optic Sensing Techniques

作     者：Fan, Xinyu Wang, Bin Yang, Guangyao He, Zuyuan 

作者机构：State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China Radar Research Lab School of Information and Electronics Beijing Institute of Technology Beijing100081 China Key Laboratory of Electronic and Information Technology in Satellite Navigation Beijing Institute of Technology Ministry of Education Beijing100081 China Beijing Institute of Technology Chongqing Innovation Center Chongqing401120 China 

出 版 物：《Advanced Devices and Instrumentation》 (Adv. Devices Instrum.)

年 卷 期：2021年第2021卷

核心收录：

基　　金：This work was supported by the National Science Foundation of China (NSFC) under Grant 61775132  61735015  and 61620106015 

主　　题：Fiber optic sensors 

摘      要：Brillouin-based fiber-optic sensing has been regarded as a powerful distributed measurement tool for monitoring the conditions of modern large civil and geotechnical structures, since it provides continuous environmental information (e.g., temperature and strain) along the whole fiber used for sensing applications. In the past few decades, great research efforts were devoted to improve its performance in terms of measurement range, spatial resolution, measurement speed, sensitivity, and costeffectiveness, of which the slope-assisted measurement scheme, achieved by exploiting the linear slope of the Brillouin gain spectrum (BGS), have paved the way for dynamic distributed fiber-optic sensing. In this article, slope-assisted Brillouin-based distributed fiber-optic sensing techniques demonstrated in the past few years will be reviewed, including the slope-assisted Brillouin optical time-domain analysis/reflectometry (SA-BOTDA/SA-BOTDR), the slope-assisted Brillouin dynamic grating (BDG) sensor, and the slope-assisted Brillouin optical correlation domain analysis/reflectometry (SA-BOCDA/SA-BOCDR). Avenues for future research and development of slope-assisted Brillouin-based fiber-optic sensors are also prospected. © 2021 Xinyu Fan et al.