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Proceedings Paper

Temperature and strain sensor based on weak LPG and fiber ring down
Author(s): Bo Liu; Boo Guan; Guiling Sun; Guiyun Kai
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Paper Abstract

A fiber ring down with a weak long period grating for temperature and strain sensing is proposed and demonstrated. The sensing devices consist of two matched fiber Bragg gratings, a section of single mode fiber, a weak long period grating, a pulsed laser source and a photodiode. The LPG incorporated in fiber ring cavity is used as sensing element, the induced resonance wavelength shift of which will cause an additional loss in the cavity. As a result, the amplitude of applied temperature variation or strain can be obtained by simply measuring the fiber ring down time. The proposed sensing system has advantages of easy configuration and rapid response.

Paper Details

Date Published: 2 July 2007
PDF: 4 pages
Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66193O (2 July 2007); doi: 10.1117/12.738668
Show Author Affiliations
Bo Liu, Nankai Univ. (China)
Boo Guan, Dalian Univ. of Technology (China)
Guiling Sun, Nankai Univ. (China)
Guiyun Kai, Nankai Univ. (China)

Published in SPIE Proceedings Vol. 6619:
Third European Workshop on Optical Fibre Sensors
Antonello Cutolo; Brian Culshaw; José Miguel López-Higuera, Editor(s)

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