Optical to microwave clock frequency ratios with a nearly continuous strontium optical lattice clock
Open accessAbstract
Optical lattice clocks are at the forefront of frequency metrology. Both the instability and systematic uncertainty of these clocks have been reported to be two orders of magnitude smaller than the best microwave clocks. For this reason, a redefinition of the SI second based on optical clocks seems possible in the near future. However, the operation of optical lattice clocks has not yet reached the reliability that microwave clocks have achieved so far. In this paper, we report on the operation of a strontium optical lattice clock that spans several weeks, with more than 80% uptime. We make use of this long integration time to demonstrate a reproducible measurement of frequency ratios between the strontium clock transition and microwave Cs primary and Rb secondary frequency standards.
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Several optical frequency ratio measurements and independent absolute frequency measurements of optical lattice clocks have been made locally at INRIM, LNE-SYRTE, NPL, and PTB, all of which operate one or more optical clocks and Cs primary frequency standards.
“Several optical frequency ratio measurements as well as independent absolute frequency measurements of optical lattice clocks have been made locally at the following NMIs”
From Chronometric Geodesy: Methods and Applications (2019) · cites this paper as [107]
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References 28 · Cited by 102
- Authors
- Lodewyck, J., Bilicki, S., Bookjans, E., Robyr, J.-L., Shi, C., Vallet, G., Le Targat, R., Nicolodi, D., Le Coq, Y., Guéna, J., Abgrall, M., Rosenbusch, P., & Bize, S.
- Affiliations
- Université Paris Sciences et Lettres (FR)
- PSL Research University
- Corresponding author
- Lodewyck, Jérôme
- ORCID
- Venue
- Metrologia
- Publisher
- IOP Publishing
- Published
- 2016-07-08
- Volume
- 53
- Issue
- 4
- Pages
- 1123-1130
- ISSN
- 0026-1394 (ISSN-L)
- 1681-7575
- OpenAlex
- W2356207235
- Cited by
- 102
- References
- 28
- Citations by year
- 2026: 2 · 2025: 7 · 2024: 8 · 2023: 7 · 2022: 12 · 2021: 7 · 2020: 10 · 2019: 14 · 2018: 19 · 2017: 12 · 2016: 4
- FWCI
- 7.73
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Metrologia (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- HAL (submittedVersion, other-oa)
- arXiv (Cornell University)
- Funders
- Agence Nationale de la Recherche (ANR-10-LABX-48-01)
- Centre National d’Études Spatiales
- Conseil Rgional d’le de France (DIM Nano’K)
- European Metrology Research Programme (EXL-01 QESOCAS and SIB-55 ITOC)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Advanced Frequency and Time Standards
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Scientific Measurement and Uncertainty Evaluation
- Physical Sciences › Computer Science › Computer Networks and Communications › Network Time Synchronization Technologies
- Keywords
- strontium optical lattice clock, optical frequency standard, frequency ratio measurement, frequency metrology, microwave frequency standard
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