Transportable optical clocks for key comparisons

Developing travelling standards for high-performance optical clock comparisons

Optical clocks outperform current primary standards. These clocks can be compared with low 10^–18 uncertainty if there exists an optical fibre link between them. Otherwise, the comparison for time and frequency is made using satellite-based techniques with 10^–16 fractional uncertainty.

Project develops travelling frequency standards (transportable optical clocks) that enable frequency comparisons without uncertainties resulting from relativistic shifts and on intercontinental distances.

VTT MIKES will improve the stability and uptime of its 88Sr+ clock and then compare it to the transportable PTB ion clock to demonstrate key comparisons with transportable clocks as well as develop further
and characterise its existing transportable ultra-stable cavity for a Sr+.


Call 2022: Integrated European Metrology

The project (22IEM01 TOCK) has received funding from the European Partnership on Metrology, co-financed from the European Union’s Horizon Europe Research and Innovation Programme and by the Participating States.