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Enhancement of Transfer Efficiency of Cold Atoms Using an Optical Guiding Laser Beam |
LI Ke1,2,3;WANG Xiao-Rui1,2,3;HE Ling-Xiang1,2;ZHAN Ming-Sheng1,2;LU
Bao-Long1,2 |
| 1State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 4300712Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 4300713Graduate University, Chinese Academy of Sciences, Beijing 100049 |
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LI Ke, WANG Xiao-Rui, HE Ling-Xiang et al 2007 Chin. Phys. Lett. 24 2562-2565 |
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Abstract We transfer cold 87Rb atoms from a vapour cell chamber to a spatially separated UHV magneto-optical trap (MOT) with the assistance of a red-detuned optical guiding beam and a normal push beam. Efficient optical guiding of the cold atoms is observed within a small detuning window. A pulsed optical guiding beam enhances the transfer efficiency and hence allows us to collect more atoms in UHV MOT in a shorter time, which is favourable for our experiment of achieving Bose--Einstein condensates (BEC). Besides the easy operation, another advantage of this optical guiding technique is also demonstrated such that slower atomic beams may be efficiently transferred along horizontal direction. This study is a direct application of the optical guiding technique as a powerful tool.
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| Keywords:
32.80.-t
39.10.+j
32.80.Pj
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Received: 06 April 2007
Published: 16 August 2007
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