Optical clocks with 1E-18 uncertainty

Project: EU project

Project Details


Future primary frequency standards.

Optical clocks with 1 × 10-18 uncertainty have applications in a wide range of sectors from basic science and metrology to geodesy, satellite navigation and environmental monitoring.

Project develops world-leading optical atomic clocks that will support the future redefinition of the SI second and underpin timescales.

VTT MIKES studies drifts in optical cavities and real-time thermometry of ion traps and improves the design of ion trap and electronics.

Call 2015: SI Broader Scope

This project has received funding from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme.
Effective start/end date1/05/1630/04/19

Collaborative partners

  • National Physical Laboratory (NPL) (lead)
  • BA66 National metrology institute VTT MIKES
  • Czech Metrology Institute (CMI) (Project partner)
  • National Metrological Institute (INRIM) (Project partner)
  • Laboratoire National de Métrologie et d’Essais (LNE) (Project partner)
  • Paris Observatory (Project partner)
  • German National Metrology Institute (PTB) (Project partner)
  • TÜBİTAK National Metrology Institute (UME) (Project partner)
  • Leibniz University Hannover (Project partner)
  • University of Copenhagen (Project partner)
  • Nicolaus Copernicus University (Project partner)


  • EURAMET e.V.


  • optical clock
  • atomic clock
  • SI second
  • ion trap