Distributed sensing technology of high-spatial resolution based on dense ultra-short FBG array with large multiplexing capacity
Distributed sensing technology of high-spatial resolution based on dense ultra-short FBG array with large multiplexing capacity
复制标题
基于大复用容量密集超短FBG阵列的高空间分辨率分布式传感技术
DOI：
10.1364/oe.25.028112
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发表时间：
2017-11-13
期刊：
影响因子：
3.8
通讯作者：
Yu Haihu
中科院分区：
文献类型：
--
作者：
Gui Xin;Li Zhengying;Yu Haihu
我们开发了一个大的复用容量密集超短（DUS）-光纤光栅阵列的高空间分辨率分布式传感应用。所有的超短光纤光栅都具有相同的中心波长和低的峰值反射率（-40 dB），都具有短的长度（1 mm）和极小的间距（500 μ m）。通过仿真和实验研究了DUS-FBG的大复用容量和低串扰特性。利用光频域反射技术（OFDR）对DUS-FBG阵列进行了分布式温度和非均匀应变传感。我们证明了高空间分辨率超过6680 FBG沿着10米长的光纤，温度和应变精度为1.00摄氏度和20.02 μ m。分布式温度和非均匀应变传感实验结果与理论分析一致，验证了该传感器的高空间分辨率和大复用能力。(C)2017美国光学学会
We developed a large multiplexing capacity dense ultra-short (DUS)-FBG array for high spatial resolution distributed sensing applications. With identical central wavelength and low peak reflectivity (-40 dB), all the ultra-short FBGs share the short length (1 mm) and extremely small spacing (500 mu m). The large multiplexing capacity and lower crosstalk of the DUS-FBG is investigated through both simulation and experiment. Use of DUS-FBG array interrogated by optical frequency domain reflectometry (OFDR) for distributed temperature and non-uniform strain sensing was conducted. We demonstrated high spatial resolution over 6680 FBGs along a 10 m-long fiber, and temperature and strain precision of 1.00 degrees C and 20.02 mu epsilon. Distributed temperature and non-uniform strain sensing experiment results are consistent with the theoretical analysis, and verify the high spatial resolution and large multiplexing capacity. (C) 2017 Optical Society of America