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Proceedings Paper

High-spatial-resolution fast Brillouin optical fiber sensor for distributed dynamic measurement based on differential double-pulse
Author(s): Yongkang Dong; Taofei Jiang; Dengwang Zhou; Dexin Ba; Hongying Zhang; Zhiwei Lu; Liang Chen; Xiaoyi Bao
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Paper Abstract

We demonstrate a high-spatial-resolution fast Brillouin optical time-domain analysis scheme based on frequency agility and differential double-pulse for distributed dynamic measurement. The frequency-agility probe wave is obtained from the second-order sideband of the modulated light by using frequency-agility microwave signal from a wideband arbitrary waveform generator. The differential double-pulse technique is proposed to improve the spatial resolution while keeping the capability of dynamic measurement. In experiment, a spatial resolution of 20 cm is achieved by using a 52/50 ns differential double-pulse, and the distributed vibration measurement is demonstrated over a 50-m Panda fiber with a maximum vibration frequency of up to 50 Hz. With only five averages, the standard deviation of the strain accuracy is of 14με;.

Paper Details

Date Published: 15 October 2013
PDF: 4 pages
Proc. SPIE 8924, Fourth Asia Pacific Optical Sensors Conference, 892415 (15 October 2013); doi: 10.1117/12.2031472
Show Author Affiliations
Yongkang Dong, Harbin Institute of Technology (China)
Taofei Jiang, Harbin Institute of Technology (China)
Dengwang Zhou, Harbin Institute of Technology (China)
Dexin Ba, Harbin Institute of Technology (China)
Hongying Zhang, Harbin Univ. of Science and Technology (China)
Zhiwei Lu, Harbin Institute of Technology (China)
Liang Chen, Univ. of Ottawa (Canada)
Xiaoyi Bao, Univ. of Ottawa (Canada)

Published in SPIE Proceedings Vol. 8924:
Fourth Asia Pacific Optical Sensors Conference
Minghong Yang; Dongning Wang; Yun-Jiang Rao, Editor(s)

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