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Distributed temperature measurement using a Fabry–Perot effect based chirped fiber Bragg grating

✍ Scribed by P.C. Won; Y. Lai; W. Zhang; J.S. Leng; J.A.R. Williams

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
189 KB
Volume
265
Category
Article
ISSN
0030-4018

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✦ Synopsis

A temperature distribution sensing system based on the reflection spectrum of a 70 mm apodized chirped fiber Bragg grating has been demonstrated. Reflection variations created by the Fabry-Perot effect due to the intra-grating wavelength shift are presented. By fitting a parametric transfer matrix model of the grating response to measured spectra, the temperature change, position and width of a localized temperature change are obtained. This system is particularly attractive of its simplicity, high spatial resolution and ability in measuring a non-monotonic distribution. Experiments to measure two localized heating regions along the grating indicate that the technique is promising for measuring more complex temperature profiles.

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