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2017 Volume 34 Issue 6
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Xiu-Mei Wang, Yan-Ling Meng, Ya-Ning Wang, Jin-Yin Wan, Ming-Yuan Yu, Xin Wang, Ling Xiao, Tang Li, Hua-Dong Cheng, Liang Liu. 2017: Dick Effect in the Integrating Sphere Cold Atom Clock, Chinese Physics Letters, 34(6): 44-47. doi: 10.1088/0256-307X/34/6/063702
Citation: Xiu-Mei Wang, Yan-Ling Meng, Ya-Ning Wang, Jin-Yin Wan, Ming-Yuan Yu, Xin Wang, Ling Xiao, Tang Li, Hua-Dong Cheng, Liang Liu. 2017: Dick Effect in the Integrating Sphere Cold Atom Clock, Chinese Physics Letters, 34(6): 44-47. doi: 10.1088/0256-307X/34/6/063702
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Dick Effect in the Integrating Sphere Cold Atom Clock

  • Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Shanghai 201800;University of Chinese Academy of Sciences, Beijing 100039

  • Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Shanghai 201800

  • Available Online: 30/12/2017
  • Fund Project: the National Natural Science Foundation of China under Grant No 11604353,and the Youth Innovation Promotion Association of Chinese Academy of Sciences
  • 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 × 10-13T-1/2 (T is the integrating time).The frequency stability of 4.6 × 10-13T-1/2 is achieved.The development of this optimization can promote the space applications of the compact ISCAC.
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Dick Effect in the Integrating Sphere Cold Atom Clock

  • Available Online: 30/12/2017

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 × 10-13T-1/2 (T is the integrating time).The frequency stability of 4.6 × 10-13T-1/2 is achieved.The development of this optimization can promote the space applications of the compact ISCAC.

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