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Type: Journal article
Title: Accurate optical number density measurement of ¹²CO₂ and ¹³CO₂ with direct frequency comb spectroscopy
Other Titles: Accurate optical number density measurement of 12CO2 and 13CO2 with direct frequency comb spectroscopy
Author: Scholten, S.
Perrella, C.
Anstie, J.
White, R.
Luiten, A.
Citation: Physical Review Applied, 2019; 12(3):034045-1-034045-6
Publisher: American Physical Society
Issue Date: 2019
ISSN: 2331-7019
Statement of
Sarah K. Scholten, Christopher Perrella, James D. Anstie, Richard T. White, and Andre N. Luiten
Abstract: We report on the use of direct frequency comb spectroscopy to accurately measure the concentrations of ¹²C¹⁶O₂ and ¹³C¹⁶O₂ isotopologs in a gas sample. We demonstrate an accuracy of 0.5% and 12% for concentration measurements of ¹²C¹⁶O₂ and ¹³C¹⁶O₂, respectively, with the measured isotopic ratio in excellent agreement with that expected from their natural abundances. The precision of the concentration measurements is also high, at 0.03% and 1.24% for ¹²C¹⁶O₂ and ¹³C¹⁶O₂, respectively. The measurement technique is verified to be highly linear for concentrations ranging over 3 orders of magnitude. Direct frequency comb spectroscopy can be applied to numerous molecular species, and is therefore a promising technique for measurements in environmental monitoring and biomedical sciences.
Rights: © 2019 American Physical Society
RMID: 1000001709
DOI: 10.1103/PhysRevApplied.12.034045
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Appears in Collections:Physics publications

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