基于二维磁光阱的冷原子光抽运铯原子钟研究  

Research of cold atom optical pumped cesium atomic clock based on 2D-MOT

作　　者：谢伟滨 王青 齐向晖[1] 贺轩 陈徐宗[1] XIE Wei-bin;WANG Qing;QI Xiang-hui;HE Xuan;CHEN Xu-zong(Institute of Quantum Electronics,School of Electronics Engineering and Computer Science Peking University,Beijing 100871,China)

机构地区：[1]北京大学信息科学技术学院量子电子学研究所,北京100871

出　　处：《时间频率学报》2018年第3期179-184,共6页Journal of Time and Frequency

摘　　要：在前期二维磁光阱原子冷却实验的基础上,提出了一种利用二维磁光阱产生低速铯束替代传统铯原子钟原子束的方案。新方案可以有效降低铯束中原子的运动速度,压窄Ramsey线宽,从而实现慢速连续原子束原子钟。理论分析表明,该慢速冷原子光抽运铯原子钟的Ramsey线宽为同体积传统热束小铯钟的十分之一,这将有效提高光抽运铯原子钟的短期稳定度,这种原子钟是未来守时原子钟的一种新的发展方向。On the basis of previous 2D-MOT experiment,we put forward a kind of scheme that using 2D -MOT to slow the speed of cesium atoms in the cesium beam atomic clock. The new scheme can effectively reduce the speed of the atoms in the cesium beam and narrow down the line width of Ramsey fringe,thus realizes an atomic clock which has slow and continuous cesium beam. Theoretical analysis shows the line width of Ramsey fringe of the cold atom optical pumped cesium atomic clock is one-tenth of the width of traditional optical pumped cesium atomic clock, which will effectively improve the short-term stability of optical pumped cesium atomic clocks. This kind of atomic clock is a new direction of future atomic clock for time keeping.

关 键 词：冷原子 铯原子束 二维磁光阱 光抽运 

分 类 号：TH714.14[机械工程—测试计量技术及仪器]