Project: Next generation ultrastable lasers: reducing thermal noise limit and overcoming technical limitations with new materials and technologies

Acronym NEXTLASERS (Reference Number: 20FUN08)
Duration 01/06/2021 - 31/05/2024
Project Topic The European Metrology Network for Quantum Technologies has targeted the development of ultra-stable lasers and low perturbation cryogenic systems as necessary steps towards realising practical quantum clocks, and related potentially disruptive technologies. Stable laser frequency sources are fundamental to workable quantum devices, such as to produce photon pairs in quantum communications, known as frequency combs, that are optical devices that shape laser light spectra into discrete, equally spaced frequency lines, for use as reference frequencies. However, in practice, the instability of even the most stable lasers limits the resolution of quantum devices, and despite an impressive pace of development this performance barrier may continue to slow development of quantum technologies for some time. Noise from vibrations or temperature fluctuations can be suppressed, but noise from thermal fluctuations, affecting distances between surfaces of laser cavities, remains an unaddressed cause of instability. The project will lay the groundwork for developing quantum devices with frequency instabilities below 1×10-17 Hz. Novel methods will be used to optimise laser sources to reduce thermal noise and improve vibration isolation. Closed-cycle cooling for enabling cryogenic operation will be investigated, as well as digital signal processes for optimising laser wavelength for stability.
Website visit project website
Network EMPIR
Call EMPIR Call 2020

Project partner

Number Name Role Country
1 Physikalisch-Technische Bundesanstalt Coordinator Germany
2 Istituto Nazionale di Ricerca Metrologica Partner Italy
3 Laboratoire national de métrologie et d'essais Partner France
4 Observatoire de Paris Partner France
5 RISE Research Institutes of Sweden AB Partner Sweden
6 Teknologian tutkimuskeskus VTT Oy Partner Finland
7 Centre National de la Recherche Scientifique Partner France
8 Heinrich-Heine-Universitaet Duesseldorf Partner Germany
9 Fondazione LINKS - Leading Innovation & Knowledge for Society Partner Italy
10 Lunds Universitet Partner Sweden
11 Technische Universitaet Braunschweig Partner Germany
12 Uniwersytet Mikolaja Kopernika w Toruniu Partner Poland