Optical Ramsey interferences on laser cooled and trapped atoms, detected by electron shelving
Optical Ramsey interferences on laser cooled and trapped atoms, detected by electron shelving
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通过电子搁架检测到激光冷却和捕获原子的光学拉姆齐干涉
DOI：
10.1016/0030-4018(93)90645-l
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发表时间：
1993
影响因子：
2.4
通讯作者：
W. Ertmer
中科院分区：
文献类型：
--
作者：
K. Sengstock;U. Sterr;G. Hennig;D. Bettermann;J. H. Müller;W. Ertmer
基于一种新的探测方案，利用激光冷却和囚禁的原子，在镁原子复合跃迁（λ= 457 nm）上获得了分辨率为4 kHz、精度为1 Hz（Δv v = 2× 10− 15）的光学Ramsey条纹。应用脉冲激发方案的陷阱系综，拉姆齐信号几乎不受相对论多普勒效应和拉姆齐区的相位误差。的检测是基于量子放大由于电子搁置效应与陷阱动力学的合作，监测作为减少的陷阱荧光诱导的快速捕获过渡。同时记录的热原子束上的拉姆齐干涉允许直接测量二阶多普勒频移。实验的相关性，以未来的光学频率标准实现的稳定性和精度优于10 - 15，以及该系统的原子干涉测量的应用进行了讨论。
Based on a new detection scheme optical Ramsey fringes on the magnesium intercombination transition (λ= 457 nm) have been demonstrated with a resolution of 4 kHz and an accuracy of 1 Hz (Δv v≈ 2× 10− 15) using laser cooled and trapped atoms. Applying a pulsed excitation scheme to the trapped ensemble, the Ramsey signals are nearly undisturbed by the relativistic Doppler effect and phase errors of the Ramsey zones. The detection is based on the quantum amplification due to the electron shelving effect in cooperation with the trap dynamics, monitored as decrease of the trap fluorescence induced by the fast trapping transition. Simultaneously recorded Ramsey interferences on a thermal atomic beam allowed a direct measurement of the second order Doppler shift. The relevance of the experiment to future optical frequency standards achieving a stability and an accuracy of better than 10− 15 as well as applications of this system for atom interferometry are discussed.