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Wavelet Denoising Method for Improving Detection Performance of Distributed Vibration Sensor

IEEE Photonics Technology Letters · 2012 · Vol. 24(7) · pp. 542–544

Zengguang Qin✉(University of Ottawa)Liang Chen(University of Ottawa)Xiaoyi Bao(University of Ottawa)

Abstract

This letter proposed and demonstrated a wavelet technique to reduce the time domain noise to get submeter spatial resolution in the distributed vibration sensor based on phase optical time domain reflectometry. A new wavelet shrinkage approach allows the distributed vibration measurement of 20-Hz and 8-kHz events to be detected over 1-km sensing length with a 5-ns optical pulse, which is equivalent to 50-cm spatial resolution using the single-mode sensing fiber.

Advanced Fiber Optic Sensors Optical Coherence Tomography Applications Advanced Fiber Laser TechnologiesWaveletReflectometryWavelet transformComputer scienceVibrationTime domainNoise reductionNoise (video)Optical fiberImage resolution

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