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Applied Optics

Applied Optics


  • Vol. 41, Iss. 12 — Apr. 20, 2002
  • pp: 2349–2354

Isotope 18O /16O Ratio Measurements of Water Vapor by Use of the 950-nm Wavelength Region With Cavity Ring-Down and Photoacoustic Spectroscopic Techniques

Ken Samura, Satoshi Hashimoto, Masahiro Kawasaki, Akira Hayashida, Eriko Kagi, Takashi Ishiwata, and Yutaka Matsumi  »View Author Affiliations

Applied Optics, Vol. 41, Issue 12, pp. 2349-2354 (2002)

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Two optical methods, cavity ring-down spectroscopy and photoacoustic spectroscopy, are applied to the measurement of the isotope ratio <sup>18</sup>O/<sup>16</sup>O in water-vapor samples with a Nd<sup>3+</sup>:YAG pumped-dye laser. The combination band of (2ν<sub>1</sub> + ν<sub>3</sub>) in the 960-nm region of water molecules is investigated for two standard water samples, the Vienna Standard Mean Ocean Water and the Standard Light Antarctic Precipitation. The results demonstrate that the two methods have the potential of compact systems for <i>in-situ</i> measurements of H<sub>2</sub>O isotope ratio in the environment.

© 2002 Optical Society of America

OCIS Codes
(000.2170) General : Equipment and techniques
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(010.7340) Atmospheric and oceanic optics : Water
(020.3260) Atomic and molecular physics : Isotope shifts
(140.2050) Lasers and laser optics : Dye lasers
(300.6430) Spectroscopy : Spectroscopy, photothermal

Ken Samura, Satoshi Hashimoto, Masahiro Kawasaki, Akira Hayashida, Eriko Kagi, Takashi Ishiwata, and Yutaka Matsumi, "Isotope 18O /16O Ratio Measurements of Water Vapor by Use of the 950-nm Wavelength Region With Cavity Ring-Down and Photoacoustic Spectroscopic Techniques," Appl. Opt. 41, 2349-2354 (2002)

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