On-line Magazine 'Sensors & Transducers' (S&T e-Digest)

    (ISSN 1726- 5479)

Vol. 68, Issue 6, June 2006, pp. 597-605

Simultaneous Temperature and Strain Sensing with Optical Fiber Bragg Gratings

Jaw-Luen TANG¹ and Jian-Neng WANG²

¹Department of Physics, National Chung-Cheng University, 168 University Road, Chia-Yi 621, Taiwan

Phone: 886-5-2720586; FAX: 886-5-2720587; E-mail: phyjlt@ccu.edu.tw

 ²Service Center for Construction Technol. and Matr. Testing, Dept. of Construction Eng.,

Natl. Yunlin Univ. of Sci. and Technol., 123, Section 3, Univ. Road, Dou-Liou, 640, Taiwan

Phone: 886-5-5342601-4723; FAX: 886-5-5312049; E-mail: wangjn@yuntech.edu.tw

Received:  15 June 2006   Accepted: 21 June 2006   Published: 26 June 2006

Abstract. A simple and low-cost fiber grating sensor system designed to simultaneously measure temperature and strain effects is presented. The sensor was constructed with a referenced fiber Bragg for temperature measurement and a pair of fiber Bragg gratings for both temperature and strain detection. Experimental results showed that measurement errors of 0.25 ^oC  and 6 µ_E for temperature and strain were achieved, respectively.

Keywords: temperature; strain; fiber Bragg grating; sensor

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