光纤瑞利散射传感抗干涉衰落技术研究进展  

Progresses of Anti-Interference-Fading Technologies for Rayleigh-Scattering-Based Optical Fiber Sensing

作　　者：林圣淘 王子南[1,2] 熊吉 吴悦 饶云江 Lin Shengtao;Wang Zinan;Xiong Ji;Wu Yue;Rao Yunjiang(Key Laboratory of Optical Fiber Sensing&Communications(Education Ministry of China),University of Electronic Science&Technology of China(UESTC),Chengdu,Sichuan 611731,China;Center for Information Geoscience(UESTC),Chengdu,Sichuan 611731,China;Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang,Sichuan 621900,China;Research Center for Optical Fiber Sensing,Zhejiang Laboratory,Hangzhou,Zhejiang 311121,China)

机构地区：[1]电子科技大学光纤传感与通信教育部重点实验室,四川成都611731 [2]电子科技大学信息地学研究中心,四川成都611731 [3]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [4]之江实验室光纤传感研究中心,浙江杭州311121

出　　处：《激光与光电子学进展》2021年第13期96-114,共19页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62075030,41527805);国家万人计划青年拔尖人才项目(W030211001001);四川省杰出青年科技人才项目(2020JDJQ0024);111项目(B14039)。

摘　　要：基于光纤瑞利散射的相位敏感光时域反射仪(Φ-OTDR),具有对环境变化敏感、响应速度快等特点,是分布式光纤传感领域最重要的分支之一。然而,Φ-OTDR使用的高相干探测光波在散射过程中会不可避免地出现干涉衰落效应,相应位置会成为传感的盲区。此现象是多年来本领域的关注重点之一。本文首先简述了干涉衰落的产生机理和数学特征;然后,系统地介绍了Φ-OTDR的典型传感机制,以及干涉衰落对传感信号解调造成的影响;随后,全面地回顾了Φ-OTDR抗干涉衰落技术的研究历程;最后,对Φ-OTDR的未来发展进行了探讨。The phase-sensitive optical time domain reflectometry(Φ-OTDR) utilizes distributed Rayleigh scattering sensing to achieve sensing, and it has the advantages of high sensitivity and fast response speed to environmental disturbances. It has become one of the most important branches in the field of distributed optical fiber sensing.However, the high-coherence lightwave of Φ-OTDR will inevitably induce interference fading during the scattering process, and the corresponding positions will become blind zones for the sensing system. Fading phenomenon has been a research focus in this field for many years. In this paper, we first briefly describe the generation mechanism and mathematical characteristics of interference fading. Then, typical sensing mechanisms of Φ-OTDR are systematically introduced, as well as the influence of interference fading on the sensing signal demodulation. In addition, the research progress of anti-interference fading technologies is comprehensively reviewed. Finally, the future developments of Φ-OTDR are discussed.

关 键 词：光纤光学 光纤传感 瑞利散射 光时域反射仪 相位测量 

分 类 号：O436[机械工程—光学工程]