ArticleSensors (Basel, Switzerland)2022
Measurement of Optical Rubidium Clock Frequency Spanning 65 Days.
Article in Sensors (Basel, Switzerland), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
4 citing papers in PubMed.
- Active compensation of the AC Stark shift in a two-photon rubidium optical frequency reference using power modulation.Physical review applied · 2026Article
- Demonstration of a mobile optical clock ensemble at sea.Nature communications · 2025Article
- Design of a Board-Level Integrated Multi-Channel Radio Frequency Source for the TransportableSensors (Basel, Switzerland) · 2025Article
- Evaluating Optical Clock Performance for GNSS Positioning.Sensors (Basel, Switzerland) · 2023Review
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Optical clocks are emerging as next-generation timekeeping devices with technological and scientific use cases. Simplified atomic sources such as vapor cells may offer a straightforward path to field use, but suffer from long-term frequency drifts and environmental sensitivities. Here, we measure a laboratory optical clock based on warm rubidium atoms and find low levels of drift on the month-long timescale. We observe and quantify helium contamination inside the glass vapor cell by gradually removing the helium via a vacuum apparatus. We quantify a drift rate of 4×10-15/day, a 10 day Allan deviation less than 5×10-15, and an absolute frequency of the Rb-87 two-photon clock transition of 385,284,566,371,190(1970) Hz. These results support the premise that optical vapor cell clocks will be able to meet future technology needs in navigation and communications as sensors of time and frequency.
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Registered trials
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