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Proceedings Paper

Trace gas detection via cavity ring down spectroscopy
Author(s): Richard A.H. Engeln; Rienk T. Jongma; Maarten G.H. Boogaarts; Iwan Holleman; Gerard C. M. Meijer
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Paper Abstract

We report on the use of laser based cavity ring down spectroscopy in the near UV. It is this part of the spectrum that is particulary well-suited for trace gas detection, as many molecules have strong, well characterized absorption bands in this region. We show that the detection limit for e.g. NH3 is in the order of 10 ppb, for OH below 1 ppb and for Hg at the ppt level. We propose a Fourier transform based cavity ring down spectrometer, in which the advantages of cavity ring down detection are combined with the multiplex advantage of a Fourier transform spectrometer. A theoretical description of this spectrometer, as well as a proposal for the construction of a prototype are worked out.

Paper Details

Date Published: 20 September 1995
PDF: 10 pages
Proc. SPIE 2506, Air Pollution and Visibility Measurements, (20 September 1995); doi: 10.1117/12.221077
Show Author Affiliations
Richard A.H. Engeln, Univ. of Nijmegen (Netherlands)
Rienk T. Jongma, Univ. of Nijmegen (Netherlands)
Maarten G.H. Boogaarts, Univ. of Nijmegen (Netherlands)
Iwan Holleman, Univ. of Nijmegen (Netherlands)
Gerard C. M. Meijer, Univ. of Nijmegen (Netherlands)


Published in SPIE Proceedings Vol. 2506:
Air Pollution and Visibility Measurements

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