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Temperature and strain sensor based on weak LPG and fiber ring down

✍ Scribed by Liu Bo; Luo Jianhua; Kai Guiyun

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
287 KB
Volume
50
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A fiber ring down with a weak long period grating (WLPG) 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 WLPG, 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. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 111–114, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23006

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