QEPAS with electrical co-excitation for photoacoustic measurements in fluctuating background gases

QEPAS with electrical co-excitation for photoacoustic measurements in fluctuating background gases Quartz-enhanced photoacoustic spectroscopy is a photoacoustic spectroscopy technique which substitutes the conventional microphone by a quartz tuning fork which enables very sensitive detection in small volumes. The piezo-electric properties are used to transfer the oscillation amplitude into an electric signal. However, the opposite is also possible and the tuning fork can be driven electrically. By alternate electric and photoacoustic driving, it is possible to extract information about the background gas and to determine decay times rather than amplitudes which result presently in a comparable limit of detection as conventional QEPAS but still shows potential for improvement. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Physics B Springer Journals

QEPAS with electrical co-excitation for photoacoustic measurements in fluctuating background gases

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2017 by Springer-Verlag GmbH Germany
Subject
Physics; Physics, general; Physical Chemistry; Optics, Lasers, Photonics, Optical Devices; Quantum Optics; Engineering, general
ISSN
0946-2171
eISSN
1432-0649
D.O.I.
10.1007/s00340-017-6799-3
Publisher site
See Article on Publisher Site

Abstract

Quartz-enhanced photoacoustic spectroscopy is a photoacoustic spectroscopy technique which substitutes the conventional microphone by a quartz tuning fork which enables very sensitive detection in small volumes. The piezo-electric properties are used to transfer the oscillation amplitude into an electric signal. However, the opposite is also possible and the tuning fork can be driven electrically. By alternate electric and photoacoustic driving, it is possible to extract information about the background gas and to determine decay times rather than amplitudes which result presently in a comparable limit of detection as conventional QEPAS but still shows potential for improvement.

Journal

Applied Physics BSpringer Journals

Published: Aug 2, 2017

References

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