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中国计量科学研究院利用冷原子喷泉实现了9.19GHz微波与铯原子作用的Ramsey跃迁。文中介绍了NIM4#喷泉钟相关的微波 光学系统在时序控制下完成原子选态 激励 探测 信号处理的原理和装置,给出了Ramsey实验曲线:喷泉高度74cm时,Ramsey中心条纹FWHM约为0.95Hz,信噪比S N约40。实验结果的Ramsey中心条纹宽度、Rabi台宽度与相应的理论计算符合很好。
China Institute of Metrology uses the cold atom fountain to achieve the 9.19GHz microwave and cesium atom Ramsey transition. In this paper, the principle and device of atomic selective excitation detection signal processing of NIM4 # fountain clock-related microwave optical system under the timing control are introduced. The Ramsey experimental curve is given: the Ramsey center fringe FWHM is about 0.95 Hz when the fountain height is 74 cm, Signal to noise ratio SN is about 40. Experimental results of the Ramsey center fringe width, Rabi station width and the corresponding theoretical calculations in good agreement.