Active demodulation system for multiplexed FBG sensors

Bai'ou Guan; Xinyong Dong; Zhiguo Liu; Xiaoyi Dong; Hwa-Yaw Tam

doi:10.1117/12.417880

23 February 2001 Active demodulation system for multiplexed FBG sensors

Bai'ou Guan, Xinyong Dong, Zhiguo Liu, Xiaoyi Dong, Hwa-Yaw Tam

Author Affiliations +

Proceedings Volume 4357, Distributed Fiber Optical Sensors and Measuring Networks; (2001) https://doi.org/10.1117/12.417880
Event: Distributed Fiber Optical Sensors and Measuring Networks, 2000, none, Russian Federation

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.

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Bai'ou Guan, Xinyong Dong, Zhiguo Liu, Xiaoyi Dong, and Hwa-Yaw Tam "Active demodulation system for multiplexed FBG sensors", Proc. SPIE 4357, Distributed Fiber Optical Sensors and Measuring Networks, (23 February 2001); https://doi.org/10.1117/12.417880

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