论文标题
在CS喷泉极限的YB光学时钟的绝对频率测量
Absolute frequency measurement of a Yb optical clock at the limit of the Cs fountain
论文作者
论文摘要
我们介绍了在INRIM获得的Ytterbium（171YB）的新的绝对频率测量，其光学晶格Clock IT-YB1针对低温剖宫产（133C）喷泉IT-CSF2，通过持续14个月的测量运动进行了评估。通过使用氢mas作为转移振荡器或使用光学频率梳子合成CS询问的低噪声微波炉来进行测量。 171YB不受干扰的时钟过渡1S0-3P0的频率为518 295 836 590 863.44（14）Hz，总体不确定性为2.7E-16，受IT-CSF2的不确定性的限制。我们的测量与时间和频率咨询委员会建议的YB频率一致（CCTF）。该结果证实了YB作为第二个的次要表示的可靠性，并且与在光学转换上重新定义国际单位系统（SI）中第二个的过程有关
We present the new absolute frequency measurement of ytterbium (171Yb) obtained at INRiM with the optical lattice clock IT-Yb1 against the cryogenic caesium (133Cs) fountain IT-CsF2, evaluated through a measurement campaign that lasted 14 months. Measurements are performed by either using a hydrogen maser as a transfer oscillator or by synthesizing a low-noise microwave for Cs interrogation using an optical frequency comb. The frequency of the 171Yb unperturbed clock transition 1S0 - 3P0 results to be 518 295 836 590 863.44(14) Hz, with a total fractional uncertainty of 2.7e-16 that is limited by the uncertainty of IT-CsF2. Our measurement is in agreement with the Yb frequency recommended by the Consultative Committee for Time and Frequency (CCTF). This result confirms the reliability of Yb as a secondary representation of the second and is relevant to the process of redefining the second in the International System of Units (SI) on an optical transition
