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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 9, Iss. 3 — Mar. 1, 1992
  • pp: 313–320

Optical-pumping model of synchronized quantum-beat echoes

M. Tanigawa, Y. Fukuda, M. Kunitomo, T. Hashi, and T. Mishina  »View Author Affiliations

JOSA B, Vol. 9, Issue 3, pp. 313-320 (1992)

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We develop a new theoretical treatment that can explain, for the first time to our knowledge, unexpectedly strong synchronized-quantum-beat-echo (SQBE) signals that we previously observed in the ground state of sodium atoms. The SQBE is obtained by successive application of two light-pulse trains tuned to an optical transition under the condition that the pulse repetition frequency or that of one of its harmonics is equal to the separation of a ground-state sublevel pair. The theory is developed for weak optical pumping for which the duration of the light-pulse trains is much longer than the spontaneous decay time of the excited state. We show that the echo is formed effectively as a result of nonuniform depopulation from the sublevel pair to the other levels because of frequency-selective optical pumping during the rapid spontaneous decay of the excited state. Details of the experiment with sodium atoms are described also.

© 1992 Optical Society of America

Original Manuscript: November 30, 1990
Revised Manuscript: November 4, 1991
Published: March 1, 1992

M. Tanigawa, Y. Fukuda, T. Hashi, T. Mishina, and M. Kunitomo, "Optical-pumping model of synchronized quantum-beat echoes," J. Opt. Soc. Am. B 9, 313-320 (1992)

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