QEPAS sensor for breath analysis: a behavior of pressure

The measurement of trace gases has increasingly become a key technique in healthcare and other medical applications. Quartz-enhanced photoacoustic spectroscopy (QEPAS) is a suitable method that can provide the required characteristics in such applications for a comparatively low cost and small size....

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Published inApplied optics. Optical technology and biomedical optics Vol. 57; no. 10; p. C120
Main Authors Milde, Tobias, Hoppe, Morten, Tatenguem, Herve, Mordmüller, Mario, O'Gorman, James, Willer, Ulrike, Schade, Wolfgang, Sacher, Joachim
Format Journal Article
LanguageEnglish
Published United States 01.04.2018
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Summary:The measurement of trace gases has increasingly become a key technique in healthcare and other medical applications. Quartz-enhanced photoacoustic spectroscopy (QEPAS) is a suitable method that can provide the required characteristics in such applications for a comparatively low cost and small size. The quantitative detection and a low detection limit are also required by applications. In this paper, we present new results on sensing biomedically relevant gases using the on-beam QEPAS technique with some newly developed tunable high-power single-mode laser diodes based on GaSb material. The data processing and detection limit determination are done by a field programmable gate array device, as well as an automatic measurement of the resonance frequency.
ISSN:2155-3165
DOI:10.1364/AO.57.00C120