20 September 1995 High-sensitivity detection of methane-combining photoacoustic spectroscopy and optical parametric oscillator
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Proceedings Volume 2506, Air Pollution and Visibility Measurements; (1995) https://doi.org/10.1117/12.221076
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany
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.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
T. Debuisschert, Zoltan Bozoki, Andreas Miklos, Jean Raffy, Aranka M. Huber, Jean-Paul Pocholle, "High-sensitivity detection of methane-combining photoacoustic spectroscopy and optical parametric oscillator", Proc. SPIE 2506, Air Pollution and Visibility Measurements, (20 September 1995); doi: 10.1117/12.221076; https://doi.org/10.1117/12.221076
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