Demonstration of a high-performance pulsed optically pumped Rb clock based on a compact magnetron-type microwave cavity
Demonstration of a high-performance pulsed optically pumped Rb clock based on a compact magnetron-type microwave cavity
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DOI：
10.1063/1.4914493
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发表时间：
2015-03-14
影响因子：
3.2
通讯作者：
Mileti, G.
中科院分区：
文献类型：
--
作者：
Kang, S.;Gharavipour, M.;Mileti, G.
我们展示了一个高性能的脉冲光泵（POP）Rb蒸汽室时钟的磁控管型微波腔的基础上，只有44厘米（3）的外部体积。使用光学检测，获得了前所未有的35%的拉姆齐信号对比度。信噪比（30 000）和估计的散粒噪声限值（1.7 x 10（-14）tau（-1/2））与较大的圆柱形TE 011腔（100 cm 3内部体积）处于相同水平，足以实现出色的时钟稳定性。拉比振荡的测量，并表明一个足够均匀的微波磁场分布内的腔。分析了POP时钟性能不稳定的原因。证明了2.1 × 10（-13）τ（-1/2）的短期稳定性，这与噪声预算一致。(C)2015 AIP Publishing LLC.
We demonstrate a high-performance pulsed optically pumped (POP) Rb vapor-cell clock based on a magnetron-type microwave cavity of only 44 cm(3) external volume. Using optical detection, an unprecedented 35% contrast of the Ramsey signal has been obtained. Both the signal-to-noise ratio (of 30 000) and the estimated shot-noise limit of 1.7 x 10(-14) tau(-1/2) are at the same level as those found with a bigger cylindrical TE011 cavity (100 cm 3 inner volume) and are sufficient for achieving excellent clock stability. Rabi oscillations are measured and indicate a sufficiently uniform microwave magnetic field distribution inside the cavity. The instability sources for the POP clock's performance are analyzed. A short-term stability of 2.1 x 10(-13) tau(-1/2) is demonstrated which is consistent with the noise budget. (C) 2015 AIP Publishing LLC.