论文标题
光原子时钟通过动荡的空气进行比较
Optical Atomic Clock Comparison through Turbulent Air
论文作者
论文摘要
我们使用基于频率的光学双向时频传输（O-TWTFT）来测量最先进的Ytterbium和腹膜光原子时钟的光学频率比，该时钟由1.5 km的露天链路隔开。将我们的自由空间测量与通过噪声纤维链路获得的同时测量进行了比较。尽管自由空间链接中的非平稳，PS级飞行时间变化，但从这两个链接获得的比率测量值，在六天内平均30.5小时，同意$ 6 \ times10^{ - 19} $，表明O-twtft可以支持自由空间原子钟以下，低于$ 10^^{-18} $级别。
We use frequency comb-based optical two-way time-frequency transfer (O-TWTFT) to measure the optical frequency ratio of state-of-the-art ytterbium and strontium optical atomic clocks separated by a 1.5 km open-air link. Our free-space measurement is compared to a simultaneous measurement acquired via a noise-cancelled fiber link. Despite non-stationary, ps-level time-of-flight variations in the free-space link, ratio measurements obtained from the two links, averaged over 30.5 hours across six days, agree to $6\times10^{-19}$, showing that O-TWTFT can support free-space atomic clock comparisons below the $10^{-18}$ level.
