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1.国网冀北电力有限公司 信息通信分公司,北京 100054
2.武汉康普常青软件技术股份有限公司,武汉 430027
金燊(1982-),男,北京人。高级工程师,硕士,主要研究方向为信息通信。
李书华,硕士。E-mail:lishuhua1010@163.com
纸质出版日期:2021-06-10,
收稿日期:2020-06-17,
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金燊, 宋伟, 杨纯, 等. 120 km长距离分布式光纤振动传感系统[J]. 光通信研究, 2021,(3):20-24.
JIN Shen, SONG Wei, YANG Chun, et al. 120 km Long-distance Distributed Optical Fiber Vibration Sensing System[J]. Study on Optical Communications, 2021,(3):20-24.
金燊, 宋伟, 杨纯, 等. 120 km长距离分布式光纤振动传感系统[J]. 光通信研究, 2021,(3):20-24. DOI: 10.13756/j.gtxyj.2021.03.005.
JIN Shen, SONG Wei, YANG Chun, et al. 120 km Long-distance Distributed Optical Fiber Vibration Sensing System[J]. Study on Optical Communications, 2021,(3):20-24. DOI: 10.13756/j.gtxyj.2021.03.005.
针对输电线路等场景的超长距离监测应用问题,文章在分布式光纤相位敏感光时域反射仪的基础上,采用拉曼放大和外差检测的方式,设计了一种光电信号分段探测和采集的光纤传感系统。该系统依据光纤长度将光纤分为两段进行信号采集和处理,针对不同强度信号适配相应的信号处理和采集参数,解决了超长距离监测系统的动态范围不足和信噪比差的问题。经试验和分析,最终实现了超过124 km的单端超长距离分布式光纤监测系统,系统末端信噪比>10.5 dB。
Aiming at the application of ultra-long-distance monitoring in scenarios such as power transmission lines
this article uses Raman amplification and heterodyne detection based on a distributed optical fiber phase sensitive Optical Time Domain Reflectometer (OTDR) to design a photoelectric signal segmented detection collected optical fiber sensing system. According to the length of the optical fiber
the optical fiber is divided into two sections for signal processing and acquisition
and the corresponding signal processing and acquisition parameters are adapted to different strength signals to solve the problems of insufficient dynamic range and poor signal-to-noise ratio of the ultra-long-distance monitoring system. After testing and analysis
a single-end ultra-long-distance distributed optical fiber monitoring system with a distance of more than 124 km is realized. The signal-to-noise ratio at the end of the system is larger than 10.5 dB.
分布式拉曼放大瑞利散射分段放大
distributedRaman amplificationRayleigh scatteringsegmented amplification
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