| ATOMIC AND MOLECULAR PHYSICS |
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Dick Effect in the Integrating Sphere Cold Atom Clock |
| Xiu-Mei Wang1,2, Yan-Ling Meng1, Ya-Ning Wang1,2, Jin-Yin Wan1, Ming-Yuan Yu1,2, Xin Wang1,2, Ling Xiao1, Tang Li1, Hua-Dong Cheng1**, Liang Liu1** |
1Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2University of Chinese Academy of Sciences, Beijing 100039
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| Cite this article: |
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Xiu-Mei Wang, Yan-Ling Meng, Ya-Ning Wang et al 2017 Chin. Phys. Lett. 34 063702 |
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Abstract The Dick effect is an important factor limiting the frequency stability of sequentially-operating atomic frequency standards. Here we study the impact of the Dick effect in the integrating sphere cold atom clock (ISCAC). To reduce the impact of the Dick effect, a 5 MHz local oscillator with ultra-low phase noise is selected and a new microwave synthesizer is built in-house. Consequently, the phase noise of microwave signal is optimized. The contribution of the Dick effect is reduced to $2.5\times 10^{-13}\tau ^{-1/2}$ ($\tau $ is the integrating time). The frequency stability of $4.6\times 10^{-13}\tau ^{-1/2}$ is achieved. The development of this optimization can promote the space applications of the compact ISCAC.
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Received: 22 February 2017
Published: 23 May 2017
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| PACS: |
37.10.De
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(Atom cooling methods)
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42.50.Ct
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(Quantum description of interaction of light and matter; related experiments)
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42.62.Fi
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(Laser spectroscopy)
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| Fund: Supported by the National Natural Science Foundation of China under Grant No 11604353, and the Youth Innovation Promotion Association of Chinese Academy of Sciences. |
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