Distributed dynamic large strain optical fiber sensor based on the detection of spontaneous Brillouin scattering
Distributed dynamic large strain optical fiber sensor based on the detection of spontaneous Brillouin scattering
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DOI：
10.1364/ol.38.003312
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发表时间：
2013-09-01
期刊：
影响因子：
3.6
通讯作者：
Newson, Trevor P.
中科院分区：
文献类型：
--
作者：
Masoudi, Ali;Belal, Mohammad;Newson, Trevor P.
介绍了一种基于布里渊的分布式光纤动态应变传感器，该传感器利用不平衡马赫-珍德干涉仪将应变引起的布里渊频移转换为光强变化。在该干涉仪的输出端使用一个3 × 3耦合器，以允许微分和交叉相乘解调。所演示的传感器能够探测每0.5秒超过2公里传感长度的动态应变扰动，最大应变为10 me，精度为+/- 50 μ epsilon，空间分辨率为1.3 m。(C) 2013年美国光学学会
A Brillouin-based distributed optical fiber dynamic strain sensor is described which converts strain-induced Brillouin frequency shift into optical intensity variations by using an imbalanced Mach-Zhender interferometer. A 3 x 3 coupler is used at the output of this interferometer to permit differentiate and cross multiply demodulation. The demonstrated sensor is capable of probing dynamic strain disturbances over 2 km of sensing length every 0.5 s up to a strain of 10 me with an accuracy of +/- 50 mu epsilon and spatial resolution of 1.3 m. (C) 2013 Optical Society of America