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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 20, Iss. 5 — May. 1, 2003
  • pp: 960–967

Doppler cooling of an optically dense cloud of magnetically trapped atoms

Piet O. Schmidt, Sven Hensler, Jörg Werner, Thomas Binhammer, Axel Görlitz, and Tilman Pfau  »View Author Affiliations


JOSA B, Vol. 20, Issue 5, pp. 960-967 (2003)
http://dx.doi.org/10.1364/JOSAB.20.000960


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Abstract

We have studied a general technique for laser cooling a cloud of polarized trapped atoms down to the Doppler temperature. A one-dimensional optical molasses created with polarized light cools the axial motional degree of freedom of the atoms in the trap. Cooling of the radial degrees of freedom can be modeled by reabsorption of scattered photons in the optically dense cloud. We present experimental results for a cloud of chromium atoms in a magnetic trap. A simple model based on rate equations shows quantitative agreement with the experimental results. This scheme allows us to readily prepare a dense cloud of atoms in a magnetic trap with good starting conditions for evaporative cooling.

© 2003 Optical Society of America

OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(020.7010) Atomic and molecular physics : Laser trapping
(140.3320) Lasers and laser optics : Laser cooling

Citation
Piet O. Schmidt, Sven Hensler, Jörg Werner, Thomas Binhammer, Axel Görlitz, and Tilman Pfau, "Doppler cooling of an optically dense cloud of magnetically trapped atoms," J. Opt. Soc. Am. B 20, 960-967 (2003)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-20-5-960

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