Chinese Optics Letters, 2019, 17 (8): 080201, Published Online: Jul. 19, 2019
Optimization of temperature characteristics of a transportable 87Rb atomic fountain clock Download: 961次
020.3320 Laser cooling 120.3940 Metrology 270.2500 Fluctuations, relaxations, and noise 270.5570 Quantum detectors
Abstract
A high-performance transportable fountain clock is attractive for use in laboratories with high-precision time-frequency measurement requirements. This Letter reports the improvement of the stability of a transportable rubidium-87 fountain clock because of an optimization of temperature characteristics. This clock integrates its physical packaging, optical benches, microwave frequency synthesizers, and electronic controls onto an easily movable wheeled plate. Two optical benches with a high-vibration resistance are realized in this work. No additional adjustment is required after moving them several times. The Allan deviation of the fountain clock frequency was measured by comparing it with that of the hydrogen maser. The fountain clock got a short-term stability of at 1 s and long-term stability on the order of 10 16 at 100,000 s.
Xinwen Wang, Kangkang Liu, Henan Cheng, Wei Ren, Jingfeng Xiang, Jingwei Ji, Xiangkai Peng, Zhen Zhang, Jianbo Zhao, Meifeng Ye, Lin Li, Tang Li, Bin Wang, Qiuzhi Qu, Liang Liu, Desheng Lü. Optimization of temperature characteristics of a transportable 87Rb atomic fountain clock[J]. Chinese Optics Letters, 2019, 17(8): 080201.