Wavelength modulated cavity enhanced absorption spectroscopy of ammonia at 1994 nm

Details Wavelength modulated cavity enhanced absorption spectroscopy of ammonia at 1994 nm Wavelength modulated cavity enhanced absorption spectroscopy of ammonia at 1994 nm

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apphb..87..163v&link_type=abstract

Applied Physics B, Volume 87, Issue 1, pp.163-167

Physics

5

Scientific paper

We describe the sensitive detection of ammonia by wavelength modulated cavity enhanced infrared tunable diode laser absorption spectroscopy at 1994 nm. The spectrometer can measure a fractional absorption of ˜10-5 for an absorption pathlength of a few kilometers. The spectral resolution and sensitivity are sufficient to measure ammonia isotopomers (14NH3, 15NH3) in planetary atmospheres. The spectrometer is miniaturisable, so a future multiple-species version will be highly suitable for in situ planetary exploration and life-detection.

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