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Proceedings Paper

Distributed intrusion detection based on combination of phi-OTDR and POTDR
Author(s): Y. J. Rao; J. Z. Li; Z. L. Ran; K. L. Xie
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Paper Abstract

A distributed optical fiber intrusion detection system, based on the combination of the phase-sensitive optical time-domain reflectometer (φ-OTDR) and the polarization optical time domain reflectometer (POTDR), is proposed and demonstrated. The wavelet transform method and peak-enhancing signal processing are used to de-noise the sensing data and achieve high SNR. Both the φ-OTDR and the POTDR share the same optical devices and work together to enhance the veracity of detecting and locating the intrusion perturbation. Experimental results show that perturbation detection with 100% veracity is achieved over a 14km long fiber link with a spatial resolution of 50m by means of the dual outputs from the φ-OTDR and the POTDR simultaneously.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 700461 (16 May 2008); doi: 10.1117/12.786921
Show Author Affiliations
Y. J. Rao, Univ. of Electronic Science & Technology of China (China)
Chongqing Univ. (China)
J. Z. Li, Univ. of Electronic Science & Technology of China (China)
Z. L. Ran, Univ. of Electronic Science & Technology of China (China)
K. L. Xie, Univ. of Electronic Science & Technology of China (China)


Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors

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