23 May 2005 Temperature profile measurements within a chirped fiber Bragg grating using a Fourier transform technique
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Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.624247
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium
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.
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Anbhawa Nand, Anbhawa Nand, Daniel J. Kitcher, Daniel J. Kitcher, Scott A. Wade, Scott A. Wade, Stephen F. Collins, Stephen F. Collins, Gregory W. Baxter, Gregory W. Baxter, } "Temperature profile measurements within a chirped fiber Bragg grating using a Fourier transform technique", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.624247; https://doi.org/10.1117/12.624247
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