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Intracavity photoacoustic gas detection with an external cavity diode laser |
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| Authors: | Z. Bozóki J. Sneider G. Szabó A. Miklós M. Serényi G. Nagy M. Fehér |
| Affiliation: | (1) Research Group on Laser Physics of the Hungarian Academy of Sciences, JATE University, Dóm tér 9, H-6720 Szeged, Hungary;(2) Department of Photophysics, Institute of Isotopes of the Hungarian Academy of Sciences, P.O. Box 77, H-1525 Budapest, Hungary;(3) Research Institute for Technical Physics of the Hungarian Academy of Sciences, H-1325 Budapest, Hungary;(4) Chinoin Pharmaceutical and Chemical Works Ltd., Tó u. I-5., H-1045 Budapest, Hungary |
| Abstract: | The first use of an external cavity diode-laser light source in combination with a photoacoustic detector for high-sensitivity gas detection is described. This combined system is applicable for detecting gases with absorption coefficients as low as 5 x 10–8 cm–1 by operating the photoacoustic cell in an intracavity mode. Measurements were made on the 1.13  m absorption lines of water vapour. For quantitative measurements, it was found to be necessary to introduce a reference cell into the system. |
| Keywords: | 82.80.Kq 42.55.Px 42.62.Fi |
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