High-Spatial-Resolution Time-Domain Simultaneous Strain and Temperature Sensor Using Brillouin Scattering and Birefringence in a Polarization-Maintaining Fiber
High-Spatial-Resolution Time-Domain Simultaneous Strain and Temperature Sensor Using Brillouin Scattering and Birefringence in a Polarization-Maintaining Fiber
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DOI：
10.1109/lpt.2010.2056678
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发表时间：
2010-09-15
影响因子：
2.6
通讯作者：
Bao, Xiaoyi
中科院分区：
文献类型：
--
作者：
Dong, Yongkang;Chen, Liang;Bao, Xiaoyi
我们报告了通过测量保偏光纤中的布里渊频移（BFS）和双折射引起的频移（BireFS），在时域中同时进行高空间分辨率应变和温度测量。分别通过差分脉宽对布里渊光时域分析和局部布里渊光栅获得高空间分辨率的BFS和BireFS测量。在 6 米 Panda 光纤中演示了空间分辨率为 20 厘米的同步应变和温度测量。温度和应变精度分别为0.4℃和9μepsilon，范围分别可达700℃和14mepsilon。
We report on a high-spatial-resolution simultaneous strain and temperature measurement in time domain through measuring Brillouin frequency shift (BFS) and birefringence-induced frequency shift (BireFS) in a polarization-maintaining fiber. High-spatial-resolution BFS and BireFS measurement are obtained through differential pulsewidth pair Brillouin optical time-domain analysis and a local Brillouin grating, respectively. Simultaneous strain and temperature measurement with a spatial resolution of 20 cm is demonstrated in a 6-m Panda fiber. The temperature and strain accuracy is 0.4 degrees C and 9 mu epsilon, and their range can be up to 700 degrees C and 14 m epsilon, respectively.