Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Algorithm of FBG Spectrum Distortion Correction for Optical Spectra Analyzers with CCD Elements

Version 1 : Received: 24 February 2021 / Approved: 25 February 2021 / Online: 25 February 2021 (13:50:46 CET)

How to cite: Anfinogentov, V.; Karimov, K.; Kuznetsov, A.; Nureev, I.; Sakhabutdinov, A.; Lipatnikov, K.; Hussein M.R.H., S.; Ali, M. Algorithm of FBG Spectrum Distortion Correction for Optical Spectra Analyzers with CCD Elements. Preprints 2021, 2021020586 (doi: 10.20944/preprints202102.0586.v1). Anfinogentov, V.; Karimov, K.; Kuznetsov, A.; Nureev, I.; Sakhabutdinov, A.; Lipatnikov, K.; Hussein M.R.H., S.; Ali, M. Algorithm of FBG Spectrum Distortion Correction for Optical Spectra Analyzers with CCD Elements. Preprints 2021, 2021020586 (doi: 10.20944/preprints202102.0586.v1).

Abstract

Abstract: Nonlinear spectrum distortions are caused by the peculiarities of the operation of charge-coupled device elements (CCD), in which the signal exposition time (TINT) is one of the significant parameters. A change of TINT on a CCD leads to a nonlinear distortion of the resulting spectrum. Nonlinear distortion of the spectrum, in its turn, leads to errors in determining the central wavelength of Fiber Bragg Gratings (FBG) and spectrally sensitive sensors, which, in general, negatively affects the accuracy of measuring systems. The paper proposes an algorithm for correcting nonlinear distortions of the spectrum obtained on a spectrum analyzer using CCD as a receiver. It is shown that preliminary calibration of the optical spectrum analyzer with subsequent mathematical processing of the signal makes it possible to make corrections in the resulting spectrum, thereby leveling the errors caused by measurements at different TINT.

Subject Areas

nonlinear spectrum distortions; signal exposition time; fiber Bragg grating; fiber Bragg sensors; fiber optic sensors; fiber optic interrogator; optical spectrum analyzer; charge-coupled device elements; CCD

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