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Wide-range dynamic strain measurements based on K-BOTDA and frequency-agile technique
Author(s): Dengwang Zhou; Yongkang Dong; Benzhang Wang; Hongying Zhang; Zhiwei Lu
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Paper Abstract

We propose and demonstrate a novel fast Brillouin optical time-domain analysis system using the coefficient K spectrum which is defined as the ratio of phase-shift and gain of Brillouin amplification, where K features linear response, immune to the variation of pump power and a wide measure range. For a 30ns-square pump pulse, the frequency span of K spectrum can reach up to 200MHz. In dynamic strain experiment, a multi-slope assisted K-BOTDA with the measured strain of 5358.3με and the vibration frequency of 6.01Hz and 12.05Hz are demonstrated.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103237U (23 April 2017); doi: 10.1117/12.2265378
Show Author Affiliations
Dengwang Zhou, Harbin Institute of Technology (China)
Yongkang Dong, Harbin Institute of Technology (China)
Benzhang Wang, Harbin Institute of Technology (China)
Hongying Zhang, Harbin Univ. of Science and Technology (China)
Zhiwei Lu, Harbin Institute 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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