基于线性调频脉冲的光纤分布式声波传感技术  

Fiber-Optic Distributed Acoustic Sensing Technology Based on Linear Frequency Modulation Pulses

作　　者：马喆[1] 张明江[2,3] 江俊峰 张建忠[1,3] 肖连团 刘铁根[4,5,6,7] Ma Zhe;Zhang Mingjiang;Jiang Junfeng;Zhang Jianzhong;Xiao Liantuan;Liu Tiegen(College of Electronic Information and Optical Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;College of Physics,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;School of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Opto-Electronics Information Technology(Tianjin University),Ministry of Education,Tianjin University,Tianjin 300072,China;Institute of Optical Fiber Sensing of Tianjin University,Tianjin 300072,China;Tianjin Optical Fiber Sensing Engineering Center,Tianjin 300072,China)

机构地区：[1]太原理工大学电子信息与光学工程学院,山西太原030024 [2]太原理工大学物理学院,山西太原030024 [3]太原理工大学新型传感器与智能控制教育部重点实验室,山西太原030024 [4]天津大学精密仪器与光电子工程学院,天津300072 [5]天津大学光电信息技术教育部重点实验室,天津300072 [6]天津大学光纤传感研究所,天津300072 [7]天津市光纤传感工程中心,天津300072

出　　处：《激光与光电子学进展》2023年第11期14-33,共20页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62205237,62075151,62075153,62205234);山西省青年科学基金(20210302124396,202103021223042);山西省重点研发计划(202102150101004)。

摘　　要：基于线性调频(LFM)脉冲的光纤分布式声波传感(DAS)技术采用同时具有连续波形和脉冲波形优势的LFM脉冲作为探测光,利用频移产生附加相位实现光纤应变导致相位补偿的原理进行传感。可实现光纤链路沿线声/振信号的定量波形恢复,具有响应速度快、灵敏度高等特点,在地球物理学、线性基础设施监测等领域具有显著的优势和应用前景。论述基于LFM脉冲DAS技术的基本传感机理,概述传感距离、空间分辨率、频率响应与衰落噪声抑制等关键技术指标的研究进展,介绍DAS在典型应用中的进展,并对未来可能发展趋势进行探讨。Fiber-optic distributed acoustic sensing(DAS)technology based on linear frequency modulation(LFM)pulses has gained popularity due to its ability to combine the advantages of both continuous and pulse waveforms in detection light.By utilizing the principle of frequency shift,additional phases can be generated to achieve phase compensation for fiber strain sensing.This technology enables quantitative waveform recovery of acoustic signals at various locations along the fiber optic link,with fast response times and high sensitivity.DAS has significant potential for applications in geophysics and linear infrastructure monitoring.In this study,we discuss the basic sensing mechanism of LFM pulse-based DAS technology,present research progress on key scientific and technical indicators such as sensing distance,spatial resolution,frequency response,and fading noise suppression,and introduce the progress of DAS in typical applications.Finally,we discuss possible future development trends.

关 键 词：光纤光学 分布式声波传感 线性调频脉冲 瑞利散射 相位解调 

分 类 号：TN29[电子电信—物理电子学]