Simultaneous integrated cavity output spectroscopy and ringdown measurements for the detection of broad band absorbing gas species
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United States of America Patent
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Sep 22, 2020
Grant Date -
May 2, 2019
app pub date -
Nov 1, 2017
filing date -
Nov 1, 2017
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Abstract
Systems and methods for measuring a value of constituents in a mixed constituent gas having at least one broad band absorber constituent therein and at least one lock constituent are provided. The system uses a combination of integrated cavity output spectroscopy and cavity ringdown spectroscopy to determine the measurement values of constituents in a cavity of a spectrometer. Cavity ringdown in the presence of the at least one broadband absorber constituent and a reference concentration value are used to determine the constituent measurement values when the spectral width of the laser tuning range is overlapped by the absorption band of the broad band absorber in the cavity.
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