High sensitivity probe absorption technique for time-of-flight measurements on cold atoms

被引：4
|
作者：
Mohapatra, A. K. [1 ]
Unnikrishnan, C. S. [1 ]
机构：
[1] Tata Inst Fundamental Res, Fundamental Interact Lab, Gravitat grp, Bombay 40005, Maharashtra, India
来源：
PRAMANA-JOURNAL OF PHYSICS | 2006年 / 66卷 / 06期
关键词：
laser cooling; magneto-optical trap; time-of-flight; phase-sensitive detection; absorption measurement;
D O I：
10.1007/BF02708456
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report on a phase-sensitive probe absorption technique with high sensitivity, capable of detecting a few hundred ultra-cold atoms in flight in an observation time of a few milliseconds. The large signal-to-noise ratio achieved is sufficient for reliable measurements on low intensity beams of cold atoms. We demonstrate the high sensitivity and figure of merit of the simple method by measuring the time-of-flight of atoms moving upwards from a magneto-optical trap released in the gravitational field.
引用
收藏
页码：1027 / 1035
页数：9
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