A New Line-Shape Asymmetry Model for Wavelength Modulation Spectroscopy in Gaseous Flows

Nevrlý, V.; Klečka, V.; Vašinek, M.; Válek, V.; Suchánek, Jan; Dostál, Michal; Hric, B.; Bitala, P.; Zelinger, Zdeněk

doi:https://dx.doi.org/10.1515/msr-2018-0022

Number of the records: 1

A New Line-Shape Asymmetry Model for Wavelength Modulation Spectroscopy in Gaseous Flows

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SYSNO ASEP	0500338
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	A New Line-Shape Asymmetry Model for Wavelength Modulation Spectroscopy in Gaseous Flows
Author(s)	Nevrlý, V. (CZ) Klečka, V. (CZ) Vašinek, M. (CZ) Válek, V. (CZ) Suchánek, Jan (UFCH-W)_{RID, ORCID} Dostál, Michal (UFCH-W)_{RID, ORCID, SAI} Hric, B. (CZ) Bitala, P. (CZ) Zelinger, Zdeněk (UFCH-W)_{RID, ORCID}
Source Title	Measurement Science Review. - : Sciendo - ISSN 1335-8871 Roč. 18, č. 4 (2018), s. 158-161
Number of pages	4 s.
Language	eng - English
Country	SK - Slovakia
Keywords	laser spectrometer ; calibration ; frequency ; gas sensing ; spectroscopy ; modulation ; model ; line-shape asymmetry
Subject RIV	CF - Physical ; Theoretical Chemistry
OECD category	Physical chemistry
R&D Projects	LTC17071 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	GA17-05167s GA ČR - Czech Science Foundation (CSF)
Institutional support	UFCH-W - RVO:61388955
UT WOS	000441577700004
EID SCOPUS	85052156483
DOI	https://doi.org/10.1515/msr-2018-0022
Annotation	This communication reports technical notes on the development and application of an automated line-shape fitting procedure for wavelength modulation spectroscopy (WMS). Near-infrared transitions of carbon dioxide (CO2) around 1573 nm were measured in vertical cold (non-reacting) flow of CO2 at atmospheric pressure using WMS with demodulation at second harmonic frequency. Semi-empirical model based on the set of so-called Gabor functions was developed and parameters of Lorentzian line-shape profile and its asymmetry resulting from simultaneous frequency and amplitude response of the current-modulated semiconductor laser were determined. Nonlinear least-square fitting procedure employing differential evolution algorithm was successfully utilized for performing this task. Line-shape fitting procedure enabling efficient signal de-noising and background subtraction of wavelength modulation spectra was implemented into an open-source code.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2019

Number of the records: 1