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Proceedings Paper

Temperature-strain discrimination using a wavelength-division-multiplexed chirped FBG/EFPI sensor system
Author(s): Yun-Jiang Rao; Xiang Kai Zeng; Yi-Ping Wang; Tao Zhu; Zeng-Lin Ran; Lin Zhang; Ian Bennion
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Paper Abstract

A novel fibre-optic sensing system used for temperature- strain discrimination is presented. This system consists of an extrinsic Fabry-Perot interferometric sensor (EFPI) and a chirped in-fibre Bragg grating (CFBG) in series. The EFPI and the CFBG are wavelength-division multiplexed to provide strain and temperature information, respectively. The wavelength-shift of the CFBG induced by temperature change at the 1.55μm region is interrogated with an intensity- based scheme, allowing fast measurement of temperature. The cavity length change of the EFPI is measured at the 1.3μm region, allowing strain to be measured without cross-talk from the temperature sensor, i.e, the CFBG. Experimental results show that the achieved accuracies for strain and temperature measurement are ±20με and ±2°C, respectively.

Paper Details

Date Published: 30 October 2001
PDF: 7 pages
Proc. SPIE 4596, Advanced Photonic Sensors and Applications II, (30 October 2001); doi: 10.1117/12.447330
Show Author Affiliations
Yun-Jiang Rao, Chongqing Univ. (China)
Xiang Kai Zeng, Chongqing Univ. (China)
Yi-Ping Wang, Chongqing Univ. (China)
Tao Zhu, Chongqing Univ. (China)
Zeng-Lin Ran, Chongqing Univ. (China)
Lin Zhang, Aston Univ. (United Kingdom)
Ian Bennion, Aston Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 4596:
Advanced Photonic Sensors and Applications II
Anand Krishna Asundi; Wolfgang Osten; Vijay K. Varadan, Editor(s)

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