High spatial resolution phase-sensitive optical time domain reflectometer with a frequency-swept pulse
High spatial resolution phase-sensitive optical time domain reflectometer with a frequency-swept pulse
复制标题
具有扫频脉冲的高空间分辨率相敏光时域反射计
DOI：
10.1364/ol.42.000391
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发表时间：
2017-02-01
期刊：
影响因子：
3.6
通讯作者：
Cai, Haiwen
中科院分区：
文献类型：
--
作者：
Lu, Bin;Pan, Zhengqing;Cai, Haiwen
提出了一种具有光扫频脉冲（FSP）的高空间分辨率相敏光时域反射计（phi-OTDR），并在信函中给出了实验结果。FSP f-OTDR使用具有线性频率调制的光脉冲，对于较长的传感光纤具有较高的脉冲能量，并且在接收器中使用匹配滤波器来压缩处理后的脉冲宽度。从而缓解了普通f-OTDR中空间分辨率与工作距离之间的矛盾。实验获得了30 cm的空间分辨率，19.8 km的传感距离，和10 dB的振动传感的信噪比。据我们所知，这是第一次在如此长的传感范围内报告亚米空间分辨率的传感器。(C)2017美国光学学会。
A high spatial resolution phase-sensitive optical time domain reflectometer (phi-OTDR) with an optical frequency-swept pulse (FSP) is proposed, and the experimental results are presented in the Letter. The FSP f-OTDR uses optical pulses with linear frequency modulation with higher pulse energy for longer sensing fiber and uses matched filter in the receiver to compress the processed pulse width. Thus, the contradiction between spatial resolution and the working distance in ordinary f-OTDR is relaxed. A spatial resolution of 30 cm, a sensing distance of 19.8 km, and a signal-to-noise ratio of 10 dB for vibration sensing were obtained experimentally. To our best of our knowledge, this is the first time that a sub-meter spatial resolution over such a long sensing range has been reported sensors. (C) 2017 Optical Society of America.