CO2 isotope sensor using a broadband infrared source, a spectrally narrow 4.4 μm quantum cascade detector and a Fourier spectrometer
Daniel Hofstetter, Joab Di Francesco, L. Hvozdara, H.-P. Herzig & M. Beck
| Résumé |
Abstract: We report a prototype CO2 gas sensor based on a simple
blackbody infrared source and a spectrally narrow quantum cascade
detector (QCD). The detector absorption spectrum is centered at
2260 cm(-1) (4.4 um) and has a full width at half maximum of 200
cm(-1)(25 meV). It covers strong absorption bands of two spectrally
overlapping CO2 isotopomers, namely the P-branch of 12CO2 and the
R-branch of 13CO2. Acquisition of the spectral information and data
treatment were performed in a Fourier transform infrared (FTIR)
spectrometer. By flushing its sample compartment either with
nitrogen, dry fresh air, ambient air, or human breath, we were able
to determine CO2 concentrations corresponding to the different gas
mixtures. A detection limit of 500 ppb was obtained in these experiments. |
| Mots-clés |
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| Citation | Hofstetter, D., Di Francesco, J., Hvozdara, L., Herzig, H. P., & Beck, M. (2011). CO2 isotope sensor using a broadband infrared source, a spectrally narrow 4.4 μm quantum cascade detector and a Fourier spectrometer. Applied Physics B, 103(10.1007/s00340-011-4532-1), 1-1. |
| Type | Article de périodique (Anglais) |
| Date de publication | 2011 |
| Nom du périodique | Applied Physics B |
| Volume | 103 |
| Numéro | 10.1007/s00340-011-4532-1 |
| Pages | 1-1 |