Welcome to the Time and Frequency Laboratory


The Time and Frequency Laboratory constitutes one of the nine key areas of research and innovation of the University of Neuchâtel. The Time-Frequency and Optical Metrology Centre explores and pushes the frontiers in time measurements, photonics, and metrology.

Mission statement

The LTF’s mission is to explore and push the frontiers in time and frequency research, optical metrology, and ultrafast science and technology.

LTF also contributes Switzerland to join in a near future the limited number of countries that actively participate to the definition of the international atomic time TAI with primary frequency standards, with the development of the unique atomic fountain clock FOCS-2 that operates with a continuous beam of cold cesium atoms.

Key competences

LTF’s key competences to achieve its research objectives are:

  • Ultrafast lasers development and analysis
  • Various frequency combs systems
  • State-of-the-art ion beam sputtering (IBS) machine for custom optics fabrication
  • Cold atoms
  • Noise/stability analysis for microwave/optical oscillators
  • Stabilisation of microwave/optical oscillators
  • Vapour cells manufacturing and characterisation
  • CPT and double resonance spectroscopy in alkali vapour cells
  • Vapour cells atomic clocks
  • Time & Frequency metrology
  • State-of-the-art reference H-maser


18-22.09.2023 : XLII Symposium sur les instruments scientifiques, Palerme, Italie


11-15.09.2023 : EOSAM 2023, Dijon, France


26-30.06.2023 : CLEO Europe 2023, Munich, Germany


15-19.05.2023 : IEEE IFCS-EFTF 2023, Toyama, Japan


26-31.03.2023 : Ultrafast Optics XIII, Bariloche, Argentine


17.11.2022 : UFFC-S Virtual Lecturer Education Series, Prof. Gaetano Mileti


28.08-02.09.2022 : Europhoton 2022, Hannover, Germany


19-24.06.2022 : Optical Interference Coatings Conference, British Columbia, Canada


21.06.2022 : Final symposium MacQsimal, Unimail, Neuchâtel Suisse


07-10.06.2022 : MUST2022, Grindelwald, Switzerland


15-20.05.2022 : CLEO 2022, San Jose, California (USA)





30.03.2023 : Ma thèse en 180 secondes : Roman Blum, doctorant du Laboratoire Temps-Fréquence, obtient le premier prix !








21.03.2023 : Le Temps, entre Physique et Philosophie, Damiano Costa, vidéo


Janvier 2023 : Horloge atomique miniature en voie de commercialisation, Journal En Direct


25.11.2022 : Remise des titres et prix académiques 2022








27.06.2022 : De nouvelles horloges atomiques miniatures bientôt sur le marché, presse release


21.06.2022 : Capteurs quantiques à vapeur de rubidium et leur limite quantique, Alice Sinatra & Jacques Haesler, photos, vidéo


16.06.2022 : Un laser à flashes ultrarapides toujours plus puissants


11.11.2021 : The Institute of Physics and the macQsimal project participated in the Swiss Future Day. Eight youngster discovered the research activities at LTF.




27.09.2021 : Cycle de conférence, La mesure du temps, hier, aujourd'hui et demain, Dr Salomon, Unimail, Neuchâtel (photos et vidéo 1 et 2)


The watchmaking know-how of the canton of Neuchâtel and the Time-Frequency Laboratory (LTF) : interview 1 et 2


05.05.2021 L'Observatoire cantonal de Neuchâtel a vécu de 1858 à 2007, interview du Professeur Mileti


22.04.2021 Etienne Batori wins the UniNE preselection of ma thèse en 180 sécondes.

Watch Etienne's performance

Watch the full event



05.04.2021 : C'est quoi une onde ? Emission CQFD, RTS