Year-long optical time scale with sub-nanosecond capabilities

被引:2
|
作者
Formichella, Valerio [1 ]
Signorile, Giovanna [1 ]
Thai, Tung Thanh [1 ]
Galleani, Lorenzo [2 ]
Pizzocaro, Marco [1 ]
Goti, Irene [1 ,2 ]
Condio, Stefano [1 ,2 ]
Clivati, Cecilia [1 ]
Risaro, Matias [1 ]
Levi, Filippo [1 ]
Calonico, Davide [1 ]
Sesia, Ilaria [1 ]
机构
[1] INRiM, Quantum Metrol & Nanotechnol Div, Turin, Italy
[2] Politecn Torino, Dept Elect & Telecommun, Turin, Italy
来源
OPTICA | 2022年 / 11卷 / 04期
关键词
REALIZATION; CLOCK;
D O I
10.1364/OPTICA.509706
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
An atomic time scale is a method for marking events and the passage of time by using atomic frequency standards. Thanks to the superior performance of atomic clocks based on optical transitions, time scales generated with optical clocks have the potential to be more accurate and stable than those based on microwave clocks. In this work, we demonstrate an experimental optical time scale based on the INRiM Yb optical lattice clock and a hydrogen maser as a flywheel oscillator, showing sub-nanosecond accuracy over months-long periods and nanosecond accuracy over a 1-year period. The obtained results show that optical time scales have competitive performances even when the optical clock has a limited and non-uniformly distributed up-time. Consequently, we are working to include the Yb clock within the ensemble of clocks routinely used for the generation of the Italian time scale. Furthermore, these results represent a crucial step towards the future redefinition of the second of the International System of Units based on an optical transition. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码:523 / 530
页数:8
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