State Preparation in a Cold Atom Clock by Optical Pumping

被引：6
|
作者：
Duan, Yu-Xiong [1 ,2 ,3 ]
Wang, Bin [1 ,2 ]
Xiang, Jing-Feng [1 ,2 ,3 ]
Liu, Qian [1 ,2 ,3 ]
Qu, Qiu-Zhi [1 ,2 ]
Lu, De-Sheng [1 ,2 ]
Liu, Liang [1 ,2 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Key Lab Quantum Opt, Shanghai 201800, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Ctr Cold Atom Phys, Shanghai 201800, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2017年 / 34卷 / 07期
关键词：
FOUNTAIN;
D O I：
10.1088/0256-307X/34/7/073201
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We implement optical pumping to prepare cold atoms in our prototype of the Rb-87 space cold atom clock, which operates in the one-way mode. Several modifications are made on our previous physical and optical system. The effective atomic signal in the top detection zone is increased to 2.5 times with 87% pumping efficiency. The temperature of the cold atom cloud is increased by 1.4 mu K. We study the dependences of the effective signal gain and pumping efficiency on the pumping laser intensity and detuning. The effects of sigma transition are discussed. This technique may be used in the future space cold atom clocks.
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页数：5
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