积分球冷原子钟相位调制Ramsey条纹研究  

Research on Phase Modulation of Ramsey Fringes in Integrating Sphere Cold Atom Clocks

作　　者：刘鹏[1,2] 成华东[1] 孟艳玲[1] 万金银[1] 王秀梅[1,2] 王亚宁[1,2] 肖玲[1] 刘亮[1] Peng Cheng Huadong Meng Yanling Wan Jinyin Wang Xiumei Wang Yaning Xiao Ling Liu Liang(Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences, Shanghai 201800, China University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院上海光学精密机械研究所量子光学重点实验室,上海201800 [2]中国科学院大学,北京100049

出　　处：《中国激光》2016年第11期252-256,共5页Chinese Journal of Lasers

基　　金：国家高技术研究发展计划(2012AA120702)

摘　　要：在进行Ramsey作用时,以±π/2的相位差来调制同一频率点处两个周期微波脉冲,可以获得中心频率幅值为零的Ramsey条纹。这种方法可以直接通过中心频率处原子对探测光的吸收值变化来产生反馈本地振荡器的误差信号。理论上,相比于同相位Ramsey条纹,这种方法可以使得条纹信号幅值增加一倍。实验上,在积分球冷原子钟系统上,获得的相位调制Ramsey线型与理论计算相同,而且Ramsey条纹振荡幅值达到同相位下的1.6倍。In the Ramsey scheme, if one modulates two microwave pulses at the same frequency but with ±π/2 phase differences, the Ramsey fringes with zero amplitude at the central frequency can be obtained. By monitoring the variance of probe light absorption by atoms at the central frequency, one can get the error signals which feedbacks to the local oseillator. Theoretically, this method doubles the absorption signal intensity, compared with the case of Ramsey fringes with the same phase. Experimentally, the phase modulated Ramsey pattern in the integrating sphere cold atom clock fringe oscillation amplitude here is system is the same with that from theoretical calculation. Moreover, the Ramsey 1.6 times of that of Ramsey fringes with the same phase.

关 键 词：原子与分子物理学 激光冷却 积分球 原子钟 冷原子 相位调制 

分 类 号：O431.2[机械工程—光学工程] TN629.1[理学—光学]