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首页> 外文期刊>Photonics Technology Letters, IEEE >High Sensitivity Distributed Vibration Sensor Based on Polarization-Maintaining Configurations of Phase-OTDR
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High Sensitivity Distributed Vibration Sensor Based on Polarization-Maintaining Configurations of Phase-OTDR

机译:基于相位OTDR保偏配置的高灵敏度分布式振动传感器

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摘要

A system based on all-polarization-maintaining configurations of the phase-sensitive optical time-domain reflectometry (OTDR) is presented for vibration sensing. Both polarization-induced signal fading and noise are mitigated via polarization-maintaining components. The detectable frequency response is increased to $sim$ 2.25 kHz. Moreover, only a straight sensing fiber segment of $sim$0.13 m instead of several closed fiber loops is needed to sense the vibration event with a spatial resolution of 1 m, which makes it convenient for vibration monitoring in practical applications. The maximum distance between the sensing fiber and vibration event can be 18 cm.
机译:提出了一种基于相敏光学时域反射仪(OTDR)的全偏振保持配置的系统,用于振动传感。极化引起的信号衰落和噪声都可以通过极化保持组件来缓解。可检测到的频率响应增加到 $ sim $ 2.25 kHz。而且,仅需要一个 $ sim $ 0.13 m的直线传感光纤段,而不是几个闭合的光纤环路即可检测振动。事件分辨率为1 m,这使其在实际应用中便于进行振动监测。传感光纤和振动事件之间的最大距离可以为18 cm。

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