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Proceedings Paper

Temperature profile measurements within a chirped fiber Bragg grating using a Fourier transform technique
Author(s): Anbhawa Nand; Daniel J. Kitcher; Scott A. Wade; Stephen F. Collins; Gregory W. Baxter
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Paper Abstract

The use of reflected power spectra arising from a chirped fiber Bragg grating (CFBG) to extract a nonuniform temperature distribution along the grating has been investigated. The technique uses a discrete Fourier transform (FFT) in which the measured spectrum of the CFBG due to a localised temperature change was simulated using the FFT grating design model. The model operated on the reference spectrum and hypothesis temperature distributions, T(z), to generate a spectrum representative of a localised temperature disturbance. The simulated spectrum was fitted to the measured spectrum using a three-parameter disturbance function operating on position, width and amplitude of temperature change. The rms deviation of the applied value for position of a localised temperature change was 0.14 mm.

Paper Details

Date Published: 23 May 2005
PDF: 4 pages
Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.624247
Show Author Affiliations
Anbhawa Nand, Victoria Univ. (Australia)
Daniel J. Kitcher, Victoria Univ. (Australia)
Scott A. Wade, Monash Univ. (Australia)
Stephen F. Collins, Victoria Univ. (Australia)
Gregory W. Baxter, Victoria Univ. (Australia)


Published in SPIE Proceedings Vol. 5855:
17th International Conference on Optical Fibre Sensors
Marc Voet; Reinhardt Willsch; Wolfgang Ecke; Julian Jones; Brian Culshaw, Editor(s)

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