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Proceedings Paper

Improvement of FBG peak wavelength demodulation using digital signal processing algorithms
Author(s): Damian Harasim; Yussupova Gulbahar
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Paper Abstract

Spectrum reflected or transmitted by fiber Bragg grating (FBG) in laboratory environment usually has smooth shape with high signal to noise ratio, similar to Gaussian curve. However, in some applications reflected spectrum could included some strong noise, especially where sensing array contains large number of FBGs or while is used broadband, low power source. This paper presents a possibility for extraction fiber Bragg grating peak wavelength from spectra with weak signal to noise radio with most frequently using digital signal processing algorithms. The accuracy of function minimum, centroid and Gaussian fitting methods for peak wavelength detection is compared. The linearity of processing characteristics of extended FBG measured for reference high power and second, low power source is shown and compared.

Paper Details

Date Published: 11 September 2015
PDF: 7 pages
Proc. SPIE 9662, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2015, 966212 (11 September 2015); doi: 10.1117/12.2205547
Show Author Affiliations
Damian Harasim, Lublin Univ. of Technology (Poland)
Yussupova Gulbahar, Kazakh National Technical Univ. (Kazakhstan)


Published in SPIE Proceedings Vol. 9662:
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2015
Ryszard S. Romaniuk, Editor(s)

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