Atomic Microwave Power Standard Based on the Rabi Frequency
Atomic Microwave Power Standard Based on the Rabi Frequency
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DOI：
10.1109/tim.2010.2091299
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发表时间：
2011-07-01
影响因子：
5.6
通讯作者：
Komiyama, Koji
中科院分区：
文献类型：
--
作者：
Kinoshita, Moto;Shimaoka, Kazuhiro;Komiyama, Koji
原子超精细结构跃迁的拉比频率与入射电磁波的磁场强度成正比。利用已知的比例常数，可以实现基于拉比频率的原子微波功率标准。本文用原子蜡烛法测量了插入微波波导的玻璃电池中铯原子的拉比频率。通过修正玻璃电池和阻抗失配的影响，将拉比频率通过磁场强度转换为入射微波功率。在覆盖系数为2时，相对扩展不确定度约为4%。用拉比频率测得的微波功率与量热法测得的微波功率进行了比较。这些结果与它们的不确定性一致。
The Rabi frequency for an atomic hyperfine structure transition is proportional to the magnetic field strength of the incident electromagnetic wave. Using the known proportionality constant, an atomic microwave power standard based on the Rabi frequency can be realized. In this paper, the Rabi frequency of cesium atoms in a glass cell inserted in a microwave waveguide was measured using the atomic-candle method. The Rabi frequency was converted into the incident microwave power via the magnetic field strength by correcting the effects of the glass cell and impedance mismatch. The relative expanded uncertainty was approximately 4% at a coverage factor of 2. The microwave power measured from the Rabi frequency was compared with that measured by a calorimetric method. These results coincided within their uncertainties.