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Proceedings Paper

Spectroscopic measurements of isotopic water composition using a new modulation cancellation method
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Paper Abstract

We report on the application of an innovative spectroscopic balancing technique to measure isotopologue abundance quantification. We employ quartz enhanced photoacoustic spectroscopy in a 2f wavelength modulation mode as an absorption sensing technique and water vapor as a test analyte. Isotope absorption lines with very close lower energy levels and with the same quantum numbers have been selected to limit the sensitivity to temperature variations and guarantee identical broadening relaxation properties. A detection sensitivity in measuring the deviation from a standard sample δ18O of 1.4%o, in 200 sec of integration time was achieved.

Paper Details

Date Published: 20 January 2012
PDF: 8 pages
Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82682E (20 January 2012); doi: 10.1117/12.912499
Show Author Affiliations
Vincenzo Spagnolo, Politecnico di Bari (Italy)
Rice Univ. (United States)
Lei Dong, Rice Univ. (United States)
Anatoliy A. Kosterev, Rice Univ. (United States)
Frank K. Tittel, Rice Univ. (United States)

Published in SPIE Proceedings Vol. 8268:
Quantum Sensing and Nanophotonic Devices IX
Manijeh Razeghi; Eric Tournie; Gail J. Brown, Editor(s)

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