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Wavelength Shift Detection Methods Based on Cross-Correlation Analysis for Signal Demodulation of Fiber Bragg Grating Sensing System

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Abstract:

In order to improve the signal demodulation performance of fiber Bragg grating (FBG) sensing system, a wavelength shift detection method based on cross-correlation analysis is proposed to improve the accuracy of the measurement. The simulation results indicate that the absolute error of the measurement can be between 2 pm - 3 pm within the range of SNR of 14 dB-7 dB. Under the condition with high SNR, the absolute error can be approximately reduced to 0.5 pm. Hence, this demodulation algorithm can reduce the influences of the noises effectively and help to further study the features of the FBG sensor demodulation system.

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Periodical:

Applied Mechanics and Materials (Volumes 239-240)

Pages:

156-162

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.239-240.156

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Online since:

December 2012

Authors:

Fan Yang, Biao Wei

Keywords:

Cross-Correlation Analysis, Fiber Bragg Grating (FBG), Signal Demodulation Algorithm, Wavelength Shift

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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