Systems and methods for measuring trace contaminants in gas matrix using integrated cavity output spectroscopy
AssigneeABB Schweiz AG
InventorsFrançois Tanguay, Kyle Owen, John Brian Leen, Axel Meunier, Bertrand Simon Lanher
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Abstract
A laser absorption spectrometry system for gas measurement is provided. The system includes an integrated cavity output spectroscopy (ICOS) assembly. The assembly includes a gas cell including a cell body defining an optical cavity, one or more tunable diode lasers having one or more nominal wavelengths, and a reflective collimation mirror positioned in an optical path between the one or more tunable diode lasers and the gas cell.
Claims20
A laser absorption spectrometry system for gas measurement, comprising:
- an integrated cavity output spectroscopy (ICOS) assembly comprising:
- a gas cell comprising a cell body defining an optical cavity;
- one or more tunable diode lasers having one or more nominal wavelengths;
- and
- a reflective collimation mirror positioned in an optical path between the one or more tunable diode lasers and the gas cell, the reflective collimation mirror configured to reduce noise from etalons caused by parallel surfaces and/or quasi-parallel surfaces in the optical path.
A laser absorption spectrometry system for gas measurement, comprising:
- an integrated cavity output spectroscopy (ICOS) assembly comprising:
- a gas cell comprising a cell body defining an optical cavity;
- three or more tunable diode lasers having three or more nominal wavelengths and configured to emit three or more laser light in three or more wavelength ranges, the three or more wavelength ranges corresponding to absorption ranges of three or more different gases;
- and
- a combiner configured to multiplex the three or more laser light into a combined laser light configured to be coupled into the optical cavity.
Dependencies are inferred from the claim text.