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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 11 — Jun. 1, 2009
  • pp: 1651–1653

Measurement of molecular rotational temperature in a supersonic gas jet with high-order harmonic generation

Kazumichi Yoshii, Godai Miyaji, and Kenzo Miyazaki  »View Author Affiliations

Optics Letters, Vol. 34, Issue 11, pp. 1651-1653 (2009)

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We apply high-order harmonic generation to sensitive measurements of the molecular rotational temperature in a thin supersonic gas beam. The method uses nonresonant pump and probe femtosecond laser pulses to generate harmonic radiation from coherently rotating molecules. The rotational temperature of molecules can be derived accurately with high spatial and temporal resolutions from the Fourier spectrum of time-dependent signals. The validity of this method was tested for an expanding flow of an N 2 beam with a rapid temperature decrease. The results show the versatile applicability of this method.

© 2009 Optical Society of America

OCIS Codes
(190.1900) Nonlinear optics : Diagnostic applications of nonlinear optics
(300.6400) Spectroscopy : Spectroscopy, molecular beam
(320.7100) Ultrafast optics : Ultrafast measurements

ToC Category:
Nonlinear Optics

Original Manuscript: February 25, 2009
Revised Manuscript: April 17, 2009
Manuscript Accepted: April 24, 2009
Published: May 22, 2009

Kazumichi Yoshii, Godai Miyaji, and Kenzo Miyazaki, "Measurement of molecular rotational temperature in a supersonic gas jet with high-order harmonic generation," Opt. Lett. 34, 1651-1653 (2009)

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