30 May 2003 Resolution limits and efficient signal processing for fiber optic Bragg grating sensors with direct spectroscopic detection
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Abstract
Theoretical resolution limits of evaluation of centroid shift in fiber optic Bragg grating sensors are analyzed. In the theoretical model, it is assumed that random additive Gaussian noise in a sensor signal acquisition equipment is the main origin of the system error. To provide noise resistant demodulation, a new optimal signal processing algorithm is suggested. It allows accurate detection of the Bragg wavelength shifts within large range and keeps resolution very close to theoretical limit imposed by a random noise. The new demodulation technique is also compared with well known centroid detection algorithm.
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Serguei V. Miridonov, Serguei V. Miridonov, Mikhail G. Shlyagin, Mikhail G. Shlyagin, Vasilii V. Spirin, Vasilii V. Spirin, } "Resolution limits and efficient signal processing for fiber optic Bragg grating sensors with direct spectroscopic detection", Proc. SPIE 5144, Optical Measurement Systems for Industrial Inspection III, (30 May 2003); doi: 10.1117/12.501160; https://doi.org/10.1117/12.501160
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