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Title: Demodulation of multimodulation artifacts in Fourier-transform infrared spectroscopy
Authors : Schilling, Mathias
Stohner, Jürgen
Published in : Applied optics
Volume(Issue) : 56
Issue : 14
Pages : 4076
Pages to: 4084
Publisher / Ed. Institution : Optical Society of America
Issue Date: 10-May-2017
License (according to publishing contract) : CC BY-NC 4.0: Namensnennung - Nicht kommerziell 4.0 International
Type of review: Peer review (Publication)
Language : English
Subject (DDC) : 540: Chemistry
Abstract: Fourier-transform infrared (FTIR) spectra can show artifacts, for example, in the vicinity of the overtone when light is doubly modulated. Technical approaches, i.e., modifications to the spectrometer setup, have been devised in order to reduce those artifacts. Elimination of the artifacts was achieved only partly but at the expense of a loss of intensity or an increase in the noise level. We devised a computational demodulation scheme that is capable of almost fully reducing the artifacts with neither a loss of spectroscopic information nor an increase in the noise level. This has been demonstrated for the FTIR absorption spectra in the overtone regions of HCl(g) and CH4(g).
Departement: Life Sciences und Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Publication type: Article in scientific Journal
DOI : 10.21256/zhaw-3701
ISSN: 1539-4522
Appears in Collections:Publikationen Life Sciences und Facility Management

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