Experimental Investigation of the Influence of the Laser Beam Waist on Cold Atom Guiding Efficiency

Sensors
Ningfang SongYitong Song

Abstract

The primary purpose of this study is to investigate the influence of the vertical guiding laser beam waist on cold atom guiding efficiency. In this study, a double magneto-optical trap (MOT) apparatus is used. With an unbalanced force in the horizontal direction, a cold atomic beam is generated by the first MOT. The cold atoms enter the second chamber and are then re-trapped and cooled by the second MOT. By releasing a second atom cloud, the process of transferring the cold atoms from MOT to the dipole trap, which is formed by a red-detuned converged 1064-nm laser, is experimentally demonstrated. And after releasing for 20 ms, the atom cloud is guided to a distance of approximately 3 mm. As indicated by the results, the guiding efficiency depends strongly on the laser beam waist; the efficiency reaches a maximum when the waist radius (w₀) of the laser is in the range of 15 to 25 μm, while the initial atom cloud has a radius of 133 μm. Additionally, the properties of the atoms inside the dipole potential trap, such as the distribution profile and lifetime, are deduced from the fluorescence images.

References

Jul 21, 1986·Physical Review Letters·S ChuA Cable
Dec 7, 1987·Physical Review Letters·E L RaabD E Pritchard
Jul 11, 1988·Physical Review Letters·P D LettH J Metcalf
Jan 22, 1990·Physical Review Letters·T WalkerC Wieman
Aug 10, 1992·Physical Review Letters·C D WallaceP L Gould
Oct 30, 1995·Physical Review Letters·M J RennE A Cornell
Aug 3, 1998·Optics Express·R WilliamsonT Walker

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Methods Mentioned

BETA
fluorescence imaging

Software Mentioned

MOT2

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