Theoretical and Experimental Analysis of \Phi -OTDR Based on Polarization Diversity Detection

Statistical characteristics of location related intensity distribution in phase-sensitive optical time-domain reflectometry (Φ-OTDR) are theoretically analyzed and experimentally demonstrated. The polarization diversity scheme is adopted into the Φ-OTDR with a coherent detection scheme to effectivel...

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Bibliographic Details
Published in:IEEE photonics technology letters 2016-03, Vol.28 (6), p.697-700
Main Authors: Meiqi Ren, Ping Lu, Liang Chen, Xiaoyi Bao
Format: Article
Language:English
Subjects:
Coherence
Fiber sensor
Optical fiber polarization
Optical fiber sensors
phase-sensitive optical time domain reflectometry
polarization diversity
Signal to noise ratio
vibration
Vibrations
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Summary:Statistical characteristics of location related intensity distribution in phase-sensitive optical time-domain reflectometry (Φ-OTDR) are theoretically analyzed and experimentally demonstrated. The polarization diversity scheme is adopted into the Φ-OTDR with a coherent detection scheme to effectively mitigate the polarization fading effect. A real distributed sensing application for simultaneous multi-events vibration detection can thus be achieved along each position of the sensing fiber with more reliable vibration detection results. The experiment shows that the signal-to-noise ratio of two vibration signals is simultaneously enhanced by 10.9 and 8.65 dB compared with the results obtained by a conventional coherent detection scheme.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2015.2504968