1. Key Laboratory of Atomic Frequency Standard of the Chinese Academy of Sciences, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：The frequency stability of a rubidium atomic clock is determined mainly by the signal to noise ratio of the atomic frequency discrimination signal provided by the physics package. With the help of high frequency structure simulation software, a slotted-tube microwave cavity with inner-diameter of 20 mm has been designed. Analysis and measurement showed that the microwave field in the cavity is uniformly and densely distributed along the cavity axial, helpful to drive intense clock transition. Based on the cavity, a physics package with separated filter structure was designed, and filtering effect was optimized through hyperfine spectroscopy measurement with a scanning Fabry-Perot interferometer. Test showed that the physics package is of high signal to noise ratio, and can be used to built a high performance rubidium atomic clock with frequency stability of 5.0×10-13/t-1/2.
许风,郝强王鹏飞,明刚,梅刚华. 基于开槽管腔的高信噪比铷原子钟物理系统[J]. 计量学报, 2016, 37(4): 437-440.
XU Feng,HAO Qiang,WANG Peng-fei,MING Gang,MEI Gang-hua. A High Signal to Noise Ratio Physics Package with A Slotted-tube Cavity for Rubidium Atomic clock. Acta Metrologica Sinica, 2016, 37(4): 437-440.
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2016, Vol. 37 
