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Proceedings Paper

High-sensitivity detection of methane-combining photoacoustic spectroscopy and optical parametric oscillator
Author(s): T. Debuisschert; Zoltan Bozoki; Andreas Miklos; Jean Raffy; Aranka M. Huber; Jean-Paul Pocholle
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Paper Abstract

We have combined a LiNbO3 optical parametric oscillator (OPO) and a photoacoustic (PA) open cell to perform air pollution measurements. THe OPO is pumped by a Nd:YAG laser working at 10 Hz. It is tunable between 1.55 micrometers and 4.5 micrometers . The PA cell is designed to be isolated from outside acoustic noise. The OPO output wavelength is tuned between 3.39 micrometers and 3.44 micrometers to monitor absorption lines of methane. The characteristics of the pulses are E equals 2 mJ, (tau) equals 15 ns, (Delta) (nu) equals 2 cm-1. The minimum detected concentration is 1 ppm. Decreasing the background noise, detection of concentrations as low as 20 ppb is expected.

Paper Details

Date Published: 20 September 1995
PDF: 7 pages
Proc. SPIE 2506, Air Pollution and Visibility Measurements, (20 September 1995); doi: 10.1117/12.221076
Show Author Affiliations
T. Debuisschert, Thomson-CSF (France)
Zoltan Bozoki, JATE Univ. (Hungary)
Andreas Miklos, JATE Univ. (Hungary)
Jean Raffy, Thomson-CSF (France)
Aranka M. Huber, Thomson-CSF (France)
Jean-Paul Pocholle, Thomson-CSF (France)


Published in SPIE Proceedings Vol. 2506:
Air Pollution and Visibility Measurements
Peter Fabian; Volker Klein; Maurus Tacke; Konradin Weber; Christian Werner, Editor(s)

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