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Proceedings Paper

Coherent phi-OTDR based on polarization-diversity integrated coherent receiver and heterodyne detection
Author(s): Qizhong Yan; Ming Tian; Xiang Li; Qi Yang; Yimin Xu
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Paper Abstract

We demonstrate a novel distributed optical fiber sensor system based on phase-sensitive optical time-domain reflectometry (Φ-OTDR). Both the phase and the amplitude of the Rayleigh scattering (RS) light can be demodulated based on I/Q demodulation and heterodyne detection using commercial available 100G integrated coherent receiver (ICR). The polarization fading problem in Φ -OTDR can be avoided by considering the RS signal from both polarizations. The dynamic strain sensing with a sensing range of 9.8 km and a spatial resolution of 15 m is experimentally demonstrated.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032383 (23 April 2017); doi: 10.1117/12.2265463
Show Author Affiliations
Qizhong Yan, Wuhan Univ. of Technology (China)
Wuhan Wutos Co., Ltd. (China)
Ming Tian, Wuhan Wutos Co., Ltd. (China)
Xiang Li, State Key Lab. of Optical Commmunication Technologies and Networks (China)
Qi Yang, State Key Lab. of Optical Commmunication Technologies and Networks (China)
Yimin Xu, Wuhan Univ. of Technology (China)

Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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