Project: Accurate time/frequency comparison and dissemination through optical telecommunication networks

Optical atomic clocks could be used to redefine the second as they are more accurate than the microwave atomic clocks used today. However, the only way to check the performance of these optical atomic clocks is by comparing them with other atomic clocks, and the current satellite-based techniques for doing this are simply not accurate enough. This project will investigate techniques for comparing remote optical clocks, separated by distances of up to 1500 km. The project will study the fundamental limitations of optical fibre links and aims to reduce the contribution of these links to the uncertainty of the frequency calibration. As well as contributing to a redefinition of the second and fundamental physics experiments, the dissemination of atomic time through optical fibres could also provide a backup for GPS timing in power grids and mobile telecommunications networks.

Acronym SIB02 NEAT-FT (Reference Number: SIB02)
Duration 01/06/2012 - 31/05/2015
Project Topic Metrology
Project Results
(after finalisation)
See Website
Website visit project website
Network EMRP
Call EMRP Call 2011 - Health, SI Broader Scope and New Technologies

Project partner

Number Name Role Country
1 Physikalisch-Technische Bundesanstalt Coordinator Germany
2 Physikalisch-Technischer Pruefdienst des Bundesamt fuer Eich- und Vermessungswesen Partner Austria
3 Istituto Nazionale di Ricerca Metrologica Partner Italy
4 Teknologian tutkimuskeskus VTT Oy Partner Finland
5 NPL Management Limited Partner United Kingdom
6 Observatoire de Paris Partner France
7 SP Sveriges Tekniska Forskningsinstitut AB Partner Sweden
8 Ústav fotoniky a elektroniky AV ČR, v. v. i. Partner Czech Republic
9 VSL B.V. Partner Netherlands
10 CESNET, Zajmove Sdruzeni Pravnickych OSOB Observer Czech Republic