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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 3, Iss. 4 — Apr. 1, 1986
  • pp: 554–559

Studies of picosecond collisional dephasing in atomic sodium vapor using broad-bandwidth transient four-wave mixing

J. E. Golubb and T. W. Mossberg  »View Author Affiliations

JOSA B, Vol. 3, Issue 4, pp. 554-559 (1986)

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We have employed dye-laser pulses of 10-nsec duration and 1.5–10-nm bandwidth in a transient four-wave-mixing experiment to study high-perturber-pressure collisional dephasing in dilute atomic sodium vapor. Working at argon perturber pressures of several atmospheres, we are able clearly to resolve dephasing times over a thousand times shorter than our excitation pulse duration. Measured dephasing rates are in excellent agreement with those measured by more traditional methods. When both of the sodium D lines are excited, our signal displays quantum-beat-like oscillations at the 0.52-THz frequency difference between these two states. We provide a simple picture explaining the origin of these beats.

© 1986 Optical Society of America

Original Manuscript: October 23, 1985
Manuscript Accepted: November 15, 1985
Published: April 1, 1986

J. E. Golubb and T. W. Mossberg, "Studies of picosecond collisional dephasing in atomic sodium vapor using broad-bandwidth transient four-wave mixing," J. Opt. Soc. Am. B 3, 554-559 (1986)

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