In the News
Unprecedented optical clock network lays groundwork for redefining the second
In a new study, researchers carried out the most extensive coordinated comparison of optical clocks to date by operating clocks and the links connecting them simultaneously across six countries. Spanning thousands of kilometers, the experiment represents a significant step toward redefining the second and ultimately establishing a global optical time scale. News Releases Read the […]
The REFIMEVE national research infrastructure enables the distribution of ultra-stable frequency and time signals across 9,000 km of optical fiber, connecting over 30 laboratories throughout France. The exceptional accuracy of these signals—reaching beyond 10-18 — supports a wide range of scientific applications in fundamental physics, quantum technologies, photonics, geodesy and climate research, and the synchronization of large instruments in astrophysics and particle accelerators.
