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Proceedings Paper

Combined strain and temperature measurements using optical fibers
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Paper Abstract

The simple observation that the temperature coefficient of most structural materials in which strain may need to be measured differs from that of optical fiber measuring systems indicates immediately that both temperature and strain fields should be mapped with comparable accuracy in order to arrive at a reliable indication of mechanical strain. This paper initially defines the criteria for adequate compatibility between temperature and strain field measuement and then compares the techniques which have emerged in the past five years to address this problem. All techniques require the measurement of two optical parameters which are typically differential delays e.g. in interferometers and grating sensors or combined dellay and dispersion characteristics. The basic features of these measurement techniques will be addressed and comparisons made between the applicability of the various techniques. As an example, our own work measured temperature and strain to within +/- 2 C and 10 (mu) (epsilon) . Other work, e.g. with Bragg gratings achieves +/- a few tens of (mu) (epsilon) and a few degrees centrigrade.

Paper Details

Date Published: 25 September 1995
PDF: 9 pages
Proc. SPIE 2510, Fiber Optic and Laser Sensors XIII, (25 September 1995); doi: 10.1117/12.221709
Show Author Affiliations
W. Craig Michie, Univ. of Strathclyde (United Kingdom)
Brian Culshaw, Univ. of Strathclyde (United Kingdom)
Maria Konstantaki, Univ. of Strathclyde (United Kingdom)
Graham Thursby, Univ. of Strathclyde (United Kingdom)


Published in SPIE Proceedings Vol. 2510:
Fiber Optic and Laser Sensors XIII
Ramon P. DePaula; John W. Berthold, Editor(s)

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