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High-repetition-rate distributed Brillouin sensor based on optical correlation-domain analysis with differential frequency modulation

机译:基于光学相关域分析和差分频率调制的高重复率分布式布里渊传感器

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摘要

A kind of high-repetition-rate distributed Brillouin sensor is proposed and experimentally demonstrated based on optical correlation-domain analysis with differential frequency modulation, where the optical frequencies of the pump and the probe waves are modulated at slightly different RFs so that the temporal position of the measurement is continuously and repeatedly swept along a fiber under test. A distribution map of Brillouin frequency variation along a 100m optical fiber is acquired at a repetition rate of 20Hz with an accuracy of +-2.5MHz and a spatial resolution of about 80 cm.
机译:提出了一种基于差频调制的光相关域分析的高重复率分布式布里渊传感器,并在稍有不同的射频下调制了泵浦光和探测波的光频率,使得时间位置测量值沿着被测光纤连续重复扫描。以20Hz的重复频率获取布里渊频率沿100m光纤的频率分布图,精度为+ -2.5MHz,空间分辨率约为80 cm。

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