Enhancement of Transfer Efficiency of Cold Atoms Using an Optical Guiding Laser Beam
Enhancement of Transfer Efficiency of Cold Atoms Using an Optical Guiding Laser Beam
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DOI：
10.1088/0256-307x/24/9/027
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发表时间：
2007-09
影响因子：
3.5
通讯作者：
Li Ke;Wang Xiao-Rui;He Ling-Xiang;Zhan Ming-sheng;Lu Bao-Long
中科院分区：
文献类型：
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作者：
Li Ke;Wang Xiao-Rui;He Ling-Xiang;Zhan Ming-sheng;Lu Bao-Long
利用红失谐光引导束和正推束，将Rb-87冷原子从红蒸气室转移到空间分离的超高真空磁光阱（MOT）。在小失谐窗口内观察到冷原子的有效光导。脉冲光引导束提高了转移效率，使我们能够在较短的时间内收集更多的原子，这有利于我们实现玻色-爱因斯坦凝聚（BEC）的实验。除了操作简单外，这种光学导引技术的另一个优点也被证明是，慢原子束可以有效地沿沿着水平方向传输。这一研究是直接应用光导技术的有力工具。
We transfer cold Rb-87 atoms from a red vapour cell chamber to a spatially seperated UHV magneto-optical trap (MOT) with the assistance of a red-detuned optical guiding beam and 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 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 is a powerful tool.