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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 16, Iss. 5 — May. 1, 1999
  • pp: 702–709

Compression of a cold atomic cloud by on-resonance laser light

Lev Khaykovich and Nir Davidson  »View Author Affiliations


JOSA B, Vol. 16, Issue 5, pp. 702-709 (1999)
http://dx.doi.org/10.1364/JOSAB.16.000702


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Abstract

We analyze the light-induced atom–atom interactions in optically thick atomic clouds and show that, when the laser frequency is on-resonance with the atomic transition, they become attractive. On the basis of this analysis we propose and demonstrate a novel scheme to compress a cold and dense atomic cloud with a short on-resonance laser pulse. The compression force arises from attenuation of the laser light by the atomic cloud. The following free propagation of the atoms shows a lenslike behavior that yields a transient density increase at the focal time, where neither laser nor magnetic field perturbations exist. A cooling pulse, which is applied at the focal time of this lens, restores the initial temperature of atoms, and hence the phase space density is increased. Finally, we adopt our compression scheme to a quasi-steady-state mode by temporally chopping it with the cooling and trapping beams of a magnet-optical trap.

© 1999 Optical Society of America

OCIS Codes
(140.3320) Lasers and laser optics : Laser cooling
(140.7010) Lasers and laser optics : Laser trapping

Citation
Lev Khaykovich and Nir Davidson, "Compression of a cold atomic cloud by on-resonance laser light," J. Opt. Soc. Am. B 16, 702-709 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-5-702

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