|
|
|
| A High Signal to Noise Ratio Physics Package with A Slotted-tube Cavity for Rubidium Atomic clock |
| XU Feng1,2,HAO Qiang1,2,WANG Peng-fei1,2,MING Gang1,MEI Gang-hua1 |
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.
|
|
Received: 24 March 2015
Published: 31 May 2016
|
|
|
|
|
|
［1］Vannicla F, Beard R, White J, et al. GPS Block IIF Rubidium Frequency Standard Lift Test ［C］//41st Annual Precise Time and Time Interval(PPTI) Meeting, Santa Ana Pueblo, USA, 2009.
［2］Xia B H, Zhong D, An S F, et al. Characteristics of anovel kind of miniaturized cavity-cellassembly for rubidium frequency standards［J］. IEEE Transactions on Instrumentation and Measurement, 2006, 55(3):1000-1005.
［3］Da Zhong, Ganghua Mei. Study of a High Performance Rubidium Atomic Frequency Standard［C］ // 2011 Frequency Control and the European Frequency and Time Forum(FCS), 2011 Joint Conference of the IEEE International ,San Francisco, USA, 2011.
［4］Mei G H, Zhong D, An S F, et al. Miniaturized microwave cavity foratomic frequency standard［P］. US Patent: US6225870B1, 2001.
［5］Kang S B, Li W B, Wang P F, et al. Study of the Physics Package for High Performance Rubidium Frequency Standards［C］ // China Satellite Navigation Conference (CSNC), Guangzhou, China, 2012.
［6］Wenbing Li, Songbai Kang, Gang Ming, et al. Demonstration of a phyiscs package with high SNR for Rubidium Atomic Frequency Standards［C］//China Satellite Navigation Conference (CSNC), Wuhan, China, 2013.
［7］Stefanucci C, Bandi T, Merli G, et al. Compact microwave cavity for highperformance rubidium frequency standards［J］. Review of Scientific Instruments,2012, 83(10):1047061-1047068.
［8］Kuramochi N, Fukuyo H, Matsuda I, et al. Spectral profiles of the 87Rb pumping light source［J］.Japanese Journal of Applied Physics, 1976, 15(6):949-954. |
|
|
|
2016, Vol. 37 
