Optical atomic clock comparison through turbulent air
Research output: Contribution to journal › Journal article › Research › peer-review
Documents
- PhysRevResearch.2.033395
Final published version, 1.13 MB, PDF document
We use frequency-comb-based optical two-way time-frequency transfer (O-TWTFT) to measure the optical frequency ratio of state-of-the-art ytterbium and strontium optical atomic clocks separated by a 1.5-km open-air link. Our free-space measurement is compared to a simultaneous measurement acquired via a noise-cancelled fiber link. Despite nonstationary, ps-level time-of-flight variations in the free-space link, ratio measurements obtained from the two links, averaged over 30.5 hours across six days, agree to 6×10-19, showing that O-TWTFT can support free-space atomic clock comparisons below the 10-18 level.
Original language | English |
---|---|
Article number | 033395 |
Journal | Physical Review Research |
Volume | 2 |
Issue number | 3 |
ISSN | 2643-1564 |
DOIs | |
Publication status | Published - Sep 2020 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:
© 2020 authors. Published by the American Physical Society.
ID: 324557353