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Photoacoustic gas detection with LED QEPAS

: Böttger, S.; Angelmahr, M.; Schade, W.


Institute of Electrical and Electronics Engineers -IEEE-; Optical Society of America -OSA-, Washington/D.C.:
European Conference on Lasers and Electro-Optics and 12th European Quantum Electronics Conference, CLEO Europe/EQEC 2011. Vol.1 : 22 - 26 May 2011, Munich, Germany
New York, NY: IEEE, 2011
ISBN: 978-1-4577-0533-5
ISBN: 978-1-4577-0532-8
European Quantum Electronics Conference (EQEC) <12, 2011, Munich>
European Conference on Lasers and Electro-Optics (CLEO Europe) <2011, Munich>
Fraunhofer HHI ()

Various configurations and applications have been investigated and realized since the pioneering introduction of quartz-enhanced photoacoustic spectroscopy (QEPAS) by Kosterev et al. in 2002 [1]. However, the required submillimeter diameter of the acoustic resonator demands an excellent beam quality of laser source and precise adjustments of the QEPAS system. In a new approach, the off-beam resonator scheme [2] is proposed for avoiding these demands of conventional QEPAS systems. The positioning of tuning fork within the beam path is no longer necessary (Fig. 1).