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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 3401–3407

Modulation cancellation method for isotope 18O/16O ratio measurements in water

Vincenzo Spagnolo, Lei Dong, Anatoliy A. Kosterev, and Frank K. Tittel  »View Author Affiliations

Optics Express, Vol. 20, Issue 4, pp. 3401-3407 (2012)

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The application of an innovative spectroscopic balancing technique to measure the isotope 18O/16O ratio in water vapor is reported. Quartz enhanced photoacoustic spectroscopy has been employed as the absorption sensing technique. Two isotope absorption lines with the same quantum numbers, with very close lower energy levels, have been selected to limit the sensitivity to temperature variations and guarantee identical broadening as well as relaxation properties. The sensitivity in measuring the deviation from a standard sample δ18O is 1.4‰, in 200 sec of integration time.

© 2012 OSA

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(280.3420) Remote sensing and sensors : Laser sensors

ToC Category:

Original Manuscript: October 17, 2011
Revised Manuscript: November 21, 2011
Manuscript Accepted: December 5, 2011
Published: January 30, 2012

Vincenzo Spagnolo, Lei Dong, Anatoliy A. Kosterev, and Frank K. Tittel, "Modulation cancellation method for isotope 18O/16O ratio measurements in water," Opt. Express 20, 3401-3407 (2012)

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