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Proceedings Paper

Active demodulation system for multiplexed FBG sensors
Author(s): Bai'ou Guan; Xinyong Dong; Zhiguo Liu; Xiaoyi Dong; Hwa-Yaw Tam
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Paper Abstract

An active wavelength demodulation approach with high- resolution for fiber Bragg grating sensor is proposed and demonstrated for multiplexed temperature measurement in this paper. A tunable fiber laser controlled by computer is used as the scanning light source. And the computer synchronously performs data gathering and processing. Here Gaussian-Newton curve fitting approach is used to determine the Bragg wavelength of the grating sensors. A resolution approximately +/- 0.1 pm, corresponding to approximately +/- 0.01 degree(s)C has been demonstrated using this approach.

Paper Details

Date Published: 23 February 2001
PDF: 4 pages
Proc. SPIE 4357, Distributed Fiber Optical Sensors and Measuring Networks, (23 February 2001); doi: 10.1117/12.417880
Show Author Affiliations
Bai'ou Guan, Nankai Univ. (China)
Hong Kong Polytechnic Univ. (China)
Xinyong Dong, Nankai Univ. (China)
Zhiguo Liu, Nankai Univ. (China)
Xiaoyi Dong, Nankai Univ. (China)
Hwa-Yaw Tam, Hong Kong Polytechnic Univ. (China)

Published in SPIE Proceedings Vol. 4357:
Distributed Fiber Optical Sensors and Measuring Networks
Yuri N. Kulchin, Editor(s)

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