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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 6 — Mar. 17, 2008
  • pp: 3753–3761

Using a pair of rectangular coils in the MOT for the production of cold atom clouds with large optical density

Yen-Wei Lin, Hung-Chih Chou, Prashant P. Dwivedi, Ying-Cheng Chen, and Ite A. Yu  »View Author Affiliations

Optics Express, Vol. 16, Issue 6, pp. 3753-3761 (2008)

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We demonstrate a simple method to increase the optical density (OD) of cold atom clouds produced by a magneto-optical trap (MOT). A pair of rectangular anti-Helmholtz coils is used in the MOT to generate the magnetic field that produces the cigar-shaped atom cloud. With 7.2 × 10887Rb atoms in the cigar-type MOT, we achieve an OD of 32 as determined by the slow light measurement and this OD is large enough such that the atom cloud can almost contain the entire Gaussian light pulse. Compared to the conventional MOT under the same trapping conditions, the OD is increased by about 2.7 folds by this simple method. In anotherMOT setup of the cigar-shaped Cs atom cloud, we achieve an OD of 105 as determined by the absorption spectrum of the |6S1/2, F = 4〉→|6P3/2, F′ = 5〉 transition.

© 2008 Optical Society of America

OCIS Codes
(020.7010) Atomic and molecular physics : Laser trapping
(270.1670) Quantum optics : Coherent optical effects
(300.1030) Spectroscopy : Absorption
(020.3320) Atomic and molecular physics : Laser cooling

ToC Category:
Optical Trapping and Manipulation

Original Manuscript: January 28, 2008
Revised Manuscript: March 3, 2008
Manuscript Accepted: March 3, 2008
Published: March 6, 2008

Yen-Wei Lin, Hung-Chih Chou, Prashant P. Dwivedi, Ying-Cheng Chen, and Ite A. Yu, "Using a pair of rectangular coils in the MOT for the production of cold atom clouds with large optical density," Opt. Express 16, 3753-3761 (2008)

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