摘要
提出了一种损耗型矢量布里渊光时域分析光纤传感技术,通过构建基于外差检测的模拟实验系统测量受激布里渊散射幅度损耗谱和相移谱,实现了50m传感光纤的温度测量。结果表明,通过测量相移谱获得的布里渊频移与通过测量幅度损耗谱获得的布里渊频移基本一致,且均与温度呈良好的线性关系;由损耗型矢量布里渊光时域分析技术获得的布里渊频移的温度系数为1.16 MHz/℃,与传统布里渊光时域分析技术获得的1.2 MHz/℃具有良好的一致性。根据理论和实验结果,分析了损耗型矢量布里渊光时域分析光纤传感技术的优势。
An optical fiber sensing technology based on loss vector Brillouin optical time domain analysis （VBOTDA） is proposed. By constructing a heterodyne detection based simulation experiment system, the amplitude loss spectrum and phase shift spectrum of stimulated Brillouin scattering （SBS） are measured, and the temperature measurement of 50 m long sensing fiber is realized. The results show that the Brillouin frequency shifts obtained by SBS phase shift spectrum measurement agree basically with that obtained by amplitude loss spectrum measurement, and that both show a good linear relationship with the temperature. The temperature coefficient of Brillouin frequency shift obtained by loss VBOTDA is 1.16 MHz/℃, which is well consistent with the result of 1.2 MHz/℃ obtained by conventional BOTDA system. According to the theoretical and experimental results, the advantages of the proposed technology are analyzed.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2016年第9期56-62,共7页
Acta Optica Sinica
基金
国家自然科学基金(61377088)
河北省自然科学基金(F2014502098)
中央高校基本科研业务费专项资金(2015XS114)
关键词
光纤光学
矢量布里渊光时域分析
受激布里渊散射
相移
外差检测
模拟实验
fiber optics
vector Brillouin optical time domain analysis
stimulated Brillouin scattering
phase shift
heterodyne detection
simulation experiment
