Translator Disclaimer
25 April 2006 Photoacoustic CO2 detection at 2.7 μm
Author Affiliations +
We present a new detection scheme for carbon dioxide(CO2) based on a custom-made room temperature distributed feedback (DFB) diode laser at 2.7 μm, currently representing the laser with the highest emission wavelength of its kind. The detector's especially compact and simple set-up is based on photoacoustic spectroscopy (PAS). This method makes use of the transformation of absorbed modulated radiation into a sound wave. The sensor enables a very high detection sensitivity for CO2 in the ppb range. Furthermore, the carefully selected spectral region as well as the narrow bandwidth and wide tunability of the single-mode laser ensure an excellent selectivity. Even measurements of different CO2 isotopes can be easily performed. This could enable future applications of this spectroscopic sensor in medical diagnostics (e.g. 13C-breath tests).
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Marcus Wolff, Hinrich G. Groninga, and Hermann Harde "Photoacoustic CO2 detection at 2.7 μm", Proc. SPIE 6189, Optical Sensing II, 61890X (25 April 2006);

Back to Top