Dick Effect in the Integrating Sphere Cold Atom Clock

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 in:Chinese physics letters 2017-06, Vol.34 (6), p.44-47
Main Author: 王秀梅 孟艳玲 王亚宁 万金银 于明圆 王鑫 肖玲 李唐 成华东 刘亮
Format: Article
Language:English
Subjects:
冷原子钟
积分球
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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 （3- 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 ISCA C.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/34/6/063702