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Proceedings Paper

Signal-to-noise ratio improvement in Brillouin optical correlation domain analysis combining Brillouin gain and loss effects
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Paper Abstract

A novel scheme is proposed to measure Brillouin gain spectrum in an optical fiber combining Brillouin gain and loss effects. A dual-parallel Mach-Zehnder modulator is used to generate upshifted afterward downshifted single sideband with suppressed carrier by periodically chopping the dc bias. The two successive single sidebands serve as Brillouin pump and probe waves to amplify and absorb the carrier wave for lock-in detecting of the net Brillouin gain between Brillouin gain and loss effects. The signal-to-noise ratio of the cost-effective measurement system with fewer optical devices is twofold enhanced. Distributed strain sensing ability with a nominal spatial resolution of 1.6 cm is experimentally demonstrated by utilization of this scheme into a Brillouin optical correlation domain analysis system.

Paper Details

Date Published: 17 October 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842114 (17 October 2012); doi: 10.1117/12.970481
Show Author Affiliations
Chongjiu Jin, Shanghai Jiao Tong Univ. (China)
Weiwen Zou, Shanghai Jiao Tong Univ. (China)
Jianping Chen, Shanghai Jiao Tong Univ. (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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