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Proceedings Paper

Interference-fading-free phase-demodulated OTDR system
Author(s): Zhengqing Pan; Kezhen Liang; Jun Zhou; Qing Ye; Haiwen Cai; Ronghui Qu
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Paper Abstract

A phase-shifted double pulse method is proposed to reduce the influence of inner-pulse interference induced fading on phase demodulation of the Φ-OTDR. The feasibility of the technique is experimentally verified and the measurement resolution of the Φ-OTDR is minimized to as low as 0.1rad by using this technique. The experimental system demonstrates a distributed phase monitoring capability over 4km range with SNR of >20 and detection bandwidth of >360Hz.

Paper Details

Date Published: 17 October 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842129 (17 October 2012); doi: 10.1117/12.975656
Show Author Affiliations
Zhengqing Pan, Shanghai Institute of Optics and Fine Mechanics (China)
Kezhen Liang, Shanghai Institute of Optics and Fine Mechanics (China)
Jun Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
Qing Ye, Shanghai Institute of Optics and Fine Mechanics (China)
Haiwen Cai, Shanghai Institute of Optics and Fine Mechanics (China)
Ronghui Qu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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