Correia Marlon M, Margulis Walter, Gomes Anderson S L, von der Weid Jean Pierre
Opt Express. 2022 Oct 24;30(22):40243-40250. doi: 10.1364/OE.476182.
The authors experimentally demonstrate the operation of a lasing phase-sensitive optical time-domain reflectometer (Φ-OTDR) based on random feedback from a sensing fiber. Here, the full output of the laser provides the sensing signal, in contrast to the small backscattered signal measured in a conventional OTDR. In this proof-of-principle demonstration, the laser operates as a distributed vibration sensor with signal-to-noise ratio of 23-dB and 1.37-m spatial resolution.
作者通过实验证明了基于传感光纤随机反馈的激光相位敏感光时域反射仪（Φ-OTDR）的运行情况。在此，与传统光时域反射仪中测量的小后向散射信号不同，激光器的全部输出提供传感信号。在这个原理验证演示中，该激光器作为分布式振动传感器运行，信噪比为23分贝，空间分辨率为1.37米。
