Improvement of FBG peak wavelength demodulation using digital signal processing algorithms

Damian Harasim; Yussupova Gulbahar

doi:10.1117/12.2205547

11 September 2015 Improvement of FBG peak wavelength demodulation using digital signal processing algorithms

Damian Harasim, Yussupova Gulbahar

Proceedings Volume 9662, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2015; 966212 (2015) https://doi.org/10.1117/12.2205547
Event: XXXVI Symposium on Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments (Wilga 2015), 2015, Wilga, Poland

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.

Citation Download Citation

Damian Harasim and Yussupova Gulbahar "Improvement of FBG peak wavelength demodulation using digital signal processing algorithms", Proc. SPIE 9662, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2015, 966212 (11 September 2015); https://doi.org/10.1117/12.2205547

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