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

Vincenzo Spagnolo; Lei Dong; Anatoliy A. Kosterev; Frank K. Tittel

doi:10.1117/12.912499

20 January 2012 Spectroscopic measurements of isotopic water composition using a new modulation cancellation method

Vincenzo Spagnolo, Lei Dong, Anatoliy A. Kosterev, Frank K. Tittel

Proceedings Volume 8268, Quantum Sensing and Nanophotonic Devices IX; 82682E (2012) https://doi.org/10.1117/12.912499
Event: SPIE OPTO, 2012, San Francisco, California, United States

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.

Citation Download Citation

Vincenzo Spagnolo, Lei Dong, Anatoliy A. Kosterev, and Frank K. Tittel "Spectroscopic measurements of isotopic water composition using a new modulation cancellation method", Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82682E (20 January 2012); https://doi.org/10.1117/12.912499

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