Determination of the position of a localized heat source within a chirped fibre Bragg grating using a Fourier transform technique
Nand, Anbhawa and Kitcher, Daniel J and Wade, Scott A and Nguyen, Thinh B and Baxter, Gregory W and Jones, Rhys and Collins, Stephen F (2006) Determination of the position of a localized heat source within a chirped fibre Bragg grating using a Fourier transform technique. Measurement Science and Technology, 17. pp. 1436-1445. ISSN 0957-0233Full text for this resource is not available from the Research Repository.
The ability to determine the centre position of a localized temperature change within a chirped fibre Bragg grating (CFBG) has been investigated as a function of grating strength. The intragrating sensor is based on the analysis of reflected power spectra arising from a CFBG. The technique uses a discrete Fourier transform (FFT) in which the measured spectrum of the CFBG due to a localized temperature change (heat source) was simulated using a FFT grating design model. The model operated on the reference spectrum and hypothesis temperature distributions, T (z), to generate a spectrum of a CFBG subjected to a hypothesis temperature disturbance. The simulated spectrum was fitted to the measured spectrum using a three-parameter automatic disturbance function fitting algorithm operating on position, width and amplitude of temperature change. RMS deviations to within 0.03 mm of applied values of position have been obtained.
|Uncontrolled Keywords:||chirped fibre Bragg gratings, intragrating sensors, temperature measurement|
|Subjects:||RFCD Classification > 290000 Engineering and Technology
Faculty/School/Research Centre/Department > School of Engineering and Science
|Depositing User:||Ms Phung T Tran|
|Date Deposited:||04 Feb 2009 17:13|
|Last Modified:||05 Jul 2011 23:50|
|ePrint Statistics:||View download statistics for this item|
|Citations in Scopus:||4 - View on Scopus|
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