Dick Effect in the Integrating Sphere Cold Atom Clock Supported by 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-lo...

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Bibliographic Details
Published inChinese physics letters Vol. 34; no. 6
Main Authors Wang, Xiu-Mei, Meng, Yan-Ling, Wang, Ya-Ning, Wan, Jin-Yin, Yu, Ming-Yuan, Wang, Xin, Xiao, Ling, Li, Tang, Cheng, Hua-Dong, Liu, Liang
Format Journal Article
LanguageEnglish
Published Chinese Physical Society and IOP Publishing Ltd 01.06.2017
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Summary: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 2.5×10−13τ−1/2 (τ is the integrating time). The frequency stability of 4.6×10−13τ−1/2 is achieved. The development of this optimization can promote the space applications of the compact ISCAC.
ISSN:0256-307X
DOI:10.1088/0256-307X/34/6/063702