新型超远程分布式光纤拉曼温度传感器
A novel ultra-long range distributed optical fiber Raman temperature sensor
分布式光纤拉曼温度传感器 超远程 光中继传感技术 distributed optical fiber Raman temperature sensor ultra-range optical repeating and sensing technology
摘要
基于光中继传感技术提出一种超远程分布式光纤拉曼温度传感器方案,采用在分布式光纤传感器的多段传感光缆之间嵌入多级光中继放大传感装置的方式,利用中继放大传感装置的增益克服光纤损耗,增强了光纤中自发拉曼散射光的强度,传感光缆分段分时进行测量。当在多段传感光缆之间引入N个远程光中继放大传感装置进行级联时,可实现分布式光纤传感器的N×L(L为每段传感光纤的长度)超远程监测。文章最后给出了实际测量结果,结果表明,该系统能在60 km 的传感探测长度上获取具有较高信噪比的传感信号。
Abstract
On the basis of the optical repeating and sensing technology, a novel ultra-long range optical fiber Raman temperature sensor solution is presented in this paper. The multistage optical repeating/amplifying/sensing devices are embedded among multiple sections of sensing optical cables of the sensor and the Raman scattering light from the fiber is intensified as the fiber loss is overcome by the gain of the devices. The cables are measured in sections and time. When the sensing cables are cascaded by introducing N such devices among multiple sections of the cables, N×L (L refers to the length of each piece of sensing fiber) ultra long-range monitoring of the sensor can be realized. The practical measurement results show that sensing signals with fairly high SNR can be obtained in a sensing and detecting range of 60 km.
杨斌, 皋魏, 席刚, 仝芳轩, 周正仙. 新型超远程分布式光纤拉曼温度传感器[J]. 光通信研究, 2011, 37(4): 54. Yang Bin, Gao Wei, Xi Gang, Tong Fangxuan, Zhou Zhengxian. A novel ultra-long range distributed optical fiber Raman temperature sensor[J]. Study On Optical Communications, 2011, 37(4): 54.