基于Φ-OTDR的分布式光纤扰动传感系统研究现状

Research Status of Distributed Optical Fiber Disturbance Sensing System Based on Φ-OTDR

基于相位敏感光时域反射计(Φ-OTDR)的分布式光纤扰动传感系统一直是扰动监测方面的研究热点。通过对比与传统光时域反射计(OTDR)的区别,介绍了Φ-OTDR传感系统的结构和工作原理。根据其发展动态,以提高传感距离和定位精度为目的,从Φ-OTDR系统结构的改进出发,分别论述了传统式、拉曼式、布里渊式和级联式四种典型的Φ-OTDR扰动传感系统的工作原理及研究现状,总结了各自的优缺点,为在实际应用中选择合适的系统结构提供了方向,最后展望了基于Φ-OTDR的分布式光纤扰动传感系统的应用前景。

Distributed optical fiber disturbance sensing system based on phase-sensitive time domain reflectometer（Φ-OTDR）has been a hotspot in intrusion detection.The structure and working principle ofΦ-OTDR sensing system were introduced by comparing it with traditional optical time domain reflectometer（OTDR）.Based on the development of theΦ-OTDR system,the working principle and research status of four typicalΦ-OTDR disturbance sensing systems of traditional,Raman,Brillouin and cascade ones were discussed with the improvement of system structure as the starting point,aiming at improving its sensing distance and location accuracy.Then,their advantages and disadvantages were summarized to provide a direction for selecting the appropriate system in practical application.Finally,the prospect of distributed optical fiber disturbance sensing system based onΦ-OTDR is set forth.