Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 24, Issue 7, Pages 542-544Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2011.2182643
Keywords
Distributed optical fiber sensor; phase-sensitive optical time-domain reflectometry (OTDR); vibration; wavelet denoising
Funding
- Canadian Institute for Photonic Innovations (CIPI)
- Networks of Centers of Excellence Program
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- TeraXion
- China Scholar Council
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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.
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