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28 April 2008 Photoacoustic HF sensor
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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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Matthias Dressler, Günther Helmrich, and Hermann Harde "Photoacoustic HF sensor", Proc. SPIE 7003, Optical Sensors 2008, 70031F (28 April 2008);


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