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Proceedings Paper

Improved distributed fiber optic sensing system based on single-ended double-pulse input Brillouin scattering
Author(s): Tianying Chang; Ruijuan Yang; Yongliang Wang; David Y. Li; Lei Jia; Hong-Liang Cui
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Paper Abstract

In a new distributed fiber optic sensing system, single-ended double-pulse input is used to strengthen Brillouin backscattered light by increasing the population of acoustic phonons. The first pulse (pump pulse), has a wide pulsewidth (tens or hundreds of us) and is used to generate a nonlinear population of acoustic phonons in the sensing fiber. Whereas the second pulse (probe pulse) has a different central wavelength and a much narrower pulse-width (several ns), and is emitted into the sensing fiber with a controlled time delay to absorb the generated abundant acoustic phonons, so that strong Anti-Stokes light can be generated. In this way, Brillouin backscattered light can be detected easily, leading to higher signal to noise ratio and better spatial resolution (less than 1 m), as well as good temperature and strain resolution, and longer sensing distance.

Paper Details

Date Published: 8 March 2014
PDF: 5 pages
Proc. SPIE 9062, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014, 906203 (8 March 2014); doi: 10.1117/12.2043924
Show Author Affiliations
Tianying Chang, Jilin Univ. (China)
Ruijuan Yang, Jilin Univ. (China)
Yongliang Wang, L.C. Pegasus Corp. (China)
David Y. Li, L.C. Pegasus Corp. (China)
Lei Jia, Shandong Univ. (China)
Hong-Liang Cui, Jilin Univ. (China)

Published in SPIE Proceedings Vol. 9062:
Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014
Wolfgang Ecke; Kara J. Peters; Norbert G. Meyendorf; Theodoros E. Matikas, Editor(s)

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