We report the development of a novel laser spectrometer for high-sensitivity detection of methane and nitrous oxide. The system relies on a quantum-cascade laser source emitting wavelength of around 8.06 μm, where strong fundamental absorption bands occur for the considered species and their isotopomers. The detection technique is based on audio-frequency and radio-frequency modulation of laser radiation. First experimental tests have been performed to estimate the achievable detection limits and the signal reproducibility levels in view of possible measurements of 13C/12C, 18O/16O, 17O/16O and 15N/14N isotope ratios.

A frequency-modulated quantum-cascade laser for spectroscopy of CH4 and N2O isotopomers

TAMASSIA, FILIPPO;
2005

Abstract

We report the development of a novel laser spectrometer for high-sensitivity detection of methane and nitrous oxide. The system relies on a quantum-cascade laser source emitting wavelength of around 8.06 μm, where strong fundamental absorption bands occur for the considered species and their isotopomers. The detection technique is based on audio-frequency and radio-frequency modulation of laser radiation. First experimental tests have been performed to estimate the achievable detection limits and the signal reproducibility levels in view of possible measurements of 13C/12C, 18O/16O, 17O/16O and 15N/14N isotope ratios.
2005
G. Gagliardi; S. Borri; F. Tamassia; F. Capasso; C. Gmachl; D. L. Sivco; J. N. Baillargeon; A. L. Hutchinson; A. Y. Cho
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/6936
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