基于超结构光纤光栅的自发布里渊散射检测系统设计与实现

被引:2
作者
张永智
王荣
徐智勇
机构
[1] 解放军理工大学通信工程学院
关键词
自发布里渊散射; 超结构光纤光栅; 应力; 温度;
D O I
暂无
中图分类号
TP274 [数据处理、数据处理系统];
学科分类号
0804 ; 080401 ; 080402 ; 081002 ; 0835 ;
摘要
为解决光纤背向散射信号中自发布里渊散射信号提取困难的问题,针对自发布里渊散射信号的频谱特点,设计并制作了一种双峰、波长可调结构的超结构光纤光栅滤波器。该滤波器具有滤波抑制比高、滚降特性好、线宽窄、中心波长可调、插损低、稳定性高等特点。通过两级超结构光纤光栅的级联,对瑞利散射信号的抑制达到约30 dB,可以把自发布里渊散射信号的2个峰同时提取出来。在此基础上,搭建了基于布里渊散射技术的全分布式光纤传感实验系统,对长度约为32 km的传感光纤进行了实验测量,在对被测光纤上长度为130、150 m的两段光纤分别施加1200μ,ε温度变化20°C时,系统较清楚地显示出应力、温度对被测光纤的作用效果。测量结果表明,该系统可以实现光纤温度及应力的变化监测。
引用
收藏
页码:239 / 242
页数:4
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