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基于自发布里渊散射的双路分布式光纤传感器设计与实现

Design and implementation of spontaneous Brillouin scattering based double-trace distributed optical fiber sensor

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摘要

利用光纤中的布里渊散射光频移与温度和应变呈线性关系的原理,提出了一种基于自发布里渊散射的双支路分布式光纤传感系统。该系统利用不同种类光纤的布里渊频移差别,同时对两条线路的应力和温度进行监测,实现对被测对象多方位的同时测量,缩短了探测时间,提高了工作效率。本文实现了两路光纤的同时监测,用6 km的光纤作为传感介质,获得了4 m的空间分辨率。得到的实验结果表明,提出的系统能准确判断40 ns脉冲光在两路传感光纤沿线产生的自发布里渊背向散射光谱的中心频率变化。

Abstract

On the basis of linear dependence of Brillouin frequency shift in fiber on both strain and temperature, this paper proposes a distributed fiber sensing system based on spontaneous Brillouin back-scattering light. By the differences of Brillouin shifts from different kinds of optical fibers, this system can be used to distinguish the sensing area, and to obtain the temperature and strain information of different lines at the same time, so that the detecting time is shortened and work efficiency is improved. Proposed system realizes synchronous detection for two optical fiber lines, and obtains the 4 m resolution when a 6 km fiber is used as sensing media. Obtained experimental results show that the system can get the variety of the spontaneous Brillouin back-scattering light caused by a 40 ns pulse in the two sensing lines.

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中图分类号:TN253

所属栏目:光通信

基金项目:国家自然科学基金资助课题(60644001)

收稿日期:2008-11-28

修改稿日期:2008-12-13

网络出版日期:0001-01-01

作者单位    点击查看

梁浩:南京大学光通信工程研究中心,江苏 南京 210093
张旭苹:南京大学光通信工程研究中心,江苏 南京 210093
路元刚:南京大学光通信工程研究中心,江苏 南京 210093

联系人作者:梁浩(lianghao_09@yahoo.com.cn)

备注:梁浩|研究方向为海底光缆健康监测与数据分析|(1983-),女,广西人,博士研究生。

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引用该论文

LIANG Hao,ZHANG Xu-ping,LU Yuan-gang. Design and implementation of spontaneous Brillouin scattering based double-trace distributed optical fiber sensor[J]. Chinese Optics, 2009, 2(1): 60-64

梁浩,张旭苹,路元刚. 基于自发布里渊散射的双路分布式光纤传感器设计与实现[J]. 中国光学, 2009, 2(1): 60-64

被引情况

【1】王花平,向 平. 基于应变传递理论的光纤传感器优化设计. 光学 精密工程, 2016, 24(6): 1233-1241

【2】李 涛,王宇焯,王旭东,冯新焕,关柏鸥. 全新布里渊散射可切换微波光子滤波器. 红外与激光工程, 2016, 45(8): 820002--1

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