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US 11,209,354 B2Granted
Laser absorption spectroscopy isotopic gas analyzer
OwnerSerguei Koulikovinventor
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Abstract
The present invention provides systems and methods for measuring the isotope ratios of one or more trace gases based on optical absorption spectroscopy methods. The system includes an optical cavity containing a gas. The system also includes a laser optically coupled with the optical cavity, and a detector system for measuring absorption of laser light by the gas in the cavity.
Claims15
A gas analyzer system for measuring an isotopic composition of a gaseous chemical species by an optical absorption spectroscopy method, the system comprises:
- a multipass cell containing a gas mixture with the chemical species to be measured;
- a laser configured to produce a laser beam directed to the multipass cell;
- a detector system for measuring a laser light transmitted through multipass cell;
- and an intelligence module comprising a processor adapted to determine an isotopic composition of the gaseous chemical species, wherein rotational-vibrational spectra of the chemical species are measured at least within two non-overlapping spectral intervals separated by a minimum of 50 nm and selected in such a way that a first rotational-vibrational line of a first rotational-vibrational band of a first isotopologue is located in a first spectral interval, and a second rotational-vibrational line of a second rotational-vibrational band of a second isotopologue is located in a second spectral interval, and the second rotational-vibrational band is different from the first rotational-vibrational band.
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Dependencies are inferred from the claim text.