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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 11 — Jun. 1, 2010
  • pp: 1923–1925

Two-photon free-induction decay with electromagnetically induced transparency

J. F. Chen, Weixin Lu, Shuyuan Wang, M. M. T. Loy, G. K. L. Wong, and Shengwang Du  »View Author Affiliations

Optics Letters, Vol. 35, Issue 11, pp. 1923-1925 (2010)

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We report the observation of coherent two-photon free-induction decay (FID) in a three-level Λ system excited by a low-intensity square-modulated laser pulse. Using electromagnetically induced transparency in an Rb 85 cold atomic cloud, for what we believe to be the first time, we observe FID signals with coherence time exceeding the relevant atomic excited-state natural lifetime. Because of the on-resonance enhancement, the two-photon FID signal can be observed at the falling edge without using heterodyne means.

© 2010 Optical Society of America

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(190.4180) Nonlinear optics : Multiphoton processes

ToC Category:
Nonlinear Optics

Original Manuscript: December 21, 2009
Revised Manuscript: March 11, 2010
Manuscript Accepted: May 11, 2010
Published: May 28, 2010

J. F. Chen, Weixin Lu, Shuyuan Wang, M. M. T. Loy, G. K. L. Wong, and Shengwang Du, "Two-photon free-induction decay with electromagnetically induced transparency," Opt. Lett. 35, 1923-1925 (2010)

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