Microwave Pulse-Coherent Technique-Based Clock With a Novel Magnetron-Type Cavity
Microwave Pulse-Coherent Technique-Based Clock With a Novel Magnetron-Type Cavity
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具有新型磁控管型腔的基于微波脉冲相干技术的时钟
DOI：
10.1109/tuffc.2019.2955574
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发表时间：
2020-04-01
影响因子：
3.6
通讯作者：
Zhang, Shougang
中科院分区：
文献类型：
--
作者：
Hao, Qiang;Xue, Wenxiang;Zhang, Shougang
报道了一种基于新型磁控管型微波腔的高性能光抽运脉冲铷钟。腔体的体积为30 mL，能够实现高度均匀的微波场分布。随着激光频率调谐到基态超精细水平F = 2的D2线，我们观察到一个拉姆齐条纹对比度为52%的光学吸收检测。所得散粒噪声极限估计为1.6 x 10（-14）tau（-1/2）。时钟频率稳定性测量为2.3 x 10（-13）tau（-1/2）（1 - 100 s），其受到光的相对强度噪声的限制。
We report a high-performancepulsed optically pumped (POP) Rb clock based on a novel magnetrontype microwave cavity. The cavity has a volume of 30 mL, enabling a highly homogenous microwave field distribution. With the laser frequency tuning to the ground-state hyperfine level F = 2 of the D2 line, we observe a Ramsey fringe contrast of 52% in terms of optical absorption detection. The resultant shot noise limit is estimated to be 1.6 x 10(-14) tau(-1/2). The clock frequency stability is measured as 2.3 x 10(-13) tau(-1/2) (1-100 s), which is limited by the relative intensity noise of the light.