Intermittent optical frequency measurements to reduce the dead time uncertainty of frequency link
Open accessAbstract
The absolute frequency of the 87 Sr lattice clock transition was evaluated with an uncertainty of 1.1 × 10 −15 using a frequency link to the international atomic time (TAI). The frequency uncertainty of a hydrogen maser used as a transfer oscillator was reduced by homogeneously distributed intermittent measurement over a five-day grid of TAI. Three sets of four or five days measurements as well as systematic uncertainty of the clock at 8.6 × 10 −17 have resulted in an absolute frequency of 87 Sr 1 S 0 – 3 P 0 clock transition to be 429 228 004 229 872.85 (47) Hz.
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After accounting for a linear drift, the dominant contribution to the extrapolation uncertainty is due to the stochastic maser behaviour.
“After accounting for a linear drift, the dominant contribution to the extrapolation uncertainty is due to the stochastic maser behaviour 42,43,86 .”
From Intercontinental comparison of optical atomic clocks through very long baseline interferometry (2021) · cites this paper as [42]
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Self-citation
- Authors
- Hachisu, H., & Ido, T.
- Affiliations
- National Institute of Information and Communications Technology (JP)
- Venue
- Japanese Journal of Applied Physics
- Publisher
- IOP Publishing
- Published
- 2015-10-15
- Volume
- 54
- Issue
- 11
- Pages
- 112401
- ISSN
- 0021-4922 (ISSN-L)
- 1347-4065
- OpenAlex
- W1828427991
- Cited by
- 48
- References
- 35
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 3 · 2023: 3 · 2022: 3 · 2021: 1 · 2020: 5 · 2019: 2 · 2018: 10 · 2017: 9 · 2016: 10
- FWCI
- 4.91
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Japanese Journal of Applied Physics (publishedVersion, cc-by)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- 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 › Engineering › Electrical and Electronic Engineering › Advanced Electrical Measurement Techniques
- Keywords
- hydrogen maser, systematic uncertainties, optical frequency metrology
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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