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Proceedings Paper

124km phase-sensitive OTDR with Brillouin amplification
Author(s): Jin Li; Zinan Wang; Li Zhang; Fei Peng; Shunkun Xiao; Huijuan Wu; Yunjiang Rao
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Paper Abstract

A long-range (124km) fully distributed fiber-optic vibration sensing system is demonstrated, based on phase-sensitive optical time-domain reflectometry (Φ-OTDR) with counter-pumping distributed fiber Brillouin amplification (FBA). FBA significantly enhances the probe pulse signal at the second half of the sensing fiber with less than 10dBm pump power, and its amplification efficiency is demonstrated to be much higher than 26.9dBm counter-pumping Raman amplification. As a result, demodulated intrusion signals along the whole sensing range can keep high signal to noise ratio. The FBA scheme demonstrated in this work can also be incorporated in many other distributed fiber-optic sensing systems for extension of sensing distance.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91575Z (2 June 2014); doi: 10.1117/12.2059187
Show Author Affiliations
Jin Li, Univ. of Electronic Science and Technology of China (China)
Zinan Wang, Univ. of Electronic Science and Technology of China (China)
Li Zhang, Univ. of Electronic Science and Technology of China (China)
Fei Peng, Univ. of Electronic Science and Technology of China (China)
Shunkun Xiao, Univ. of Electronic Science and Technology of China (China)
Huijuan Wu, Univ. of Electronic Science and Technology of China (China)
Yunjiang Rao, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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