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Proceedings Paper

Photoacoustic HF sensor
Author(s): Matthias Dressler; Günther Helmrich; Hermann Harde
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Paper Abstract

The development of new radiation sources has a major impact on the progress of optical trace gas detection. Particularly distributed feedback (DFB) diode lasers have proven to be very useful devices for spectroscopic sensors due to their spectral purity, direct modulation via the injection current, their small size and low acquisition cost. In this contribution we present a new sensor for hydrofluoric acid (HF), based on a room temperature DFB diode laser at 2.47 μm in combination with a photoacoustic detection scheme. The sensor enables detection of HF concentrations of less than 10 ppb with an excellent selectivity.

Paper Details

Date Published: 28 April 2008
PDF: 9 pages
Proc. SPIE 7003, Optical Sensors 2008, 70031F (28 April 2008); doi: 10.1117/12.781679
Show Author Affiliations
Matthias Dressler, Helmut-Schmidt-Univ. (Germany)
Günther Helmrich, Helmut-Schmidt-Univ. (Germany)
Hermann Harde, Helmut-Schmidt-Univ. (Germany)


Published in SPIE Proceedings Vol. 7003:
Optical Sensors 2008
Francis Berghmans; Anna Grazia Mignani; Antonello Cutolo; Patrick P. Meyrueis; Thomas P. Pearsall, Editor(s)

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