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AG FIRST-TF 2025 + Workshop "Application des technologies du Temps-Fréquence au domaine de la défense et du spatial"
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Le diapositives des presentations sont desormais disponibles sur le site web de FIRST-TF
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CONFÉRENCES, WORKSHOPS, SOUTENANCES
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AG REFIMEVE 2025 – Grenoble
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La prochaine assemblée générale de REFIMEVE/T-REFIMEVE se tiendra cette année les 1 et 2 décembre à Grenoble.
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Le programme est disponible ici
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IEEE IFCS 2026: Call for Abstracts
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December 14, 2025: Abstract Submission Deadline
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February 3, 2026: Acceptance Notification
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March 3, 2026: Early Registration Deadline
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May 11 – 13, 2026: Symposia
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Presenting at IFCS offers you the opportunity to showcase your work to industry experts, gain valuable feedback, and expand your professional network. Join technical discussions that shape the future of the field, connect with collaborators, and position your contributions at the forefront of innovation—all while experiencing Tampa’s coastal energy and thriving tech scene.
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Topics of interest include:
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- Materials, Resonators & Resonator Circuits
- Oscillators, Synthesizers, Noise & Circuit Techniques’
- Microwave Frequency Standards & Applications
- Sensors & Transducers
- Timekeeping, Time & Frequency Transfer, GNSS Applications
- Optical Frequency Standards & Applications
- High-Precision Measurement & Metrology
- Quantum Technologies with Frequency Control
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EFTF 2026, the 39th edition of the European Frequency and Time Forum
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EFTF is a leading international conference and exhibition focused on the latest advances in the science and technology of Frequency and Time. In 2026, the conference will be proudly hosted by the European Space Agency (ESA) and held in Noordwijk, The Netherlands, just steps from ESTEC – ESA’s European Space Research and Technology Centre – a unique setting at the heart of Europe’s space community.
Visit the EFTF 2026 website
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Topics of Interest include:
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- Materials, Resonators & Resonator Circuits
- Oscillators, Synthesizers, Noise & Circuit Techniques
- Microwave Frequency Standards & Applications
- Sensors & Transducers
- Timekeeping, Time & Frequency Transfer, GNSS Applications
- Optical Frequency Standards & Applications
- High-Precision Measurement & Metrology
- Quantum Technologies with Frequency Control
- Tutorials by renowned experts
- Invited and contributed presentations across a wide range of topics
- Plenary sessions with leading voices in the field
- Exhibition area with global industry leaders
- Awards, including the EFTF Awards and Student Paper Competition
- Abstract Submission is now closed
- Notification of Acceptance: 12 January 2026
- Early Registration Deadline: 20 February 2026
- Tutorials: 20 April 2026
- Conference Dates: 21–23 April 2026
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Thanks to IEEE technical co-sponsorship, accepted papers will be published in IEEE Xplore®.
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We warmly invite you to join us in Noordwijk for this exciting edition of EFTF.
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Precise Time and Time Interval Systems and Applications Meeting
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The ION International Technical Meeting (ITM) features a technical program related to positioning, navigation and timing and includes the ION Fellows and Annual Awards presentations. The meeting will take place in Anaheim, California, January 26-29, 2026, and will be co-located with the Precise Time and Time Interval Systems and Applications Meeting (PTTI).
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ITM is the ION’s winter meeting with peer-reviewed technical papers related to positioning, navigation, and timing and includes the ION Fellows and Annual Awards presentations.
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PTTI is the technical conference designed to disseminate and coordinate PTTI information at the user level; review present and future PTTI requirements; inform government and industry engineers, technicians and managers of precise time and frequency technology and its problems; and provide an opportunity for an active exchange of new technology associated with PTTI.
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Soutenaces à venir
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Soutenance de thèse de Ziad Rustom – 15 decembre 2025
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These cofinancé par FIRST-TF
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La soutenance aura lieu à 14h à l’Observatoire de la Cote d’Azur, site du plateau de Calern (Alpes Maritimes)
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« MetroCom-I: Lien de Communication Optique en Espace-Libre à 10 Gbps pour la métrologie du Temps et de la Distance / MetroCom-I: 10 Gbps Free-Space Optical Communication link for Time and Distance Metrology »
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Free-Space Optical (FSO) links, notably Satellite Laser Ranging (SLR) systems, emerges as efficient alternative to traditional free-space RF techniques for Ground-Space applications. Motivated by the increasing demand for accurate ranging and synchronization in geodesy, space navigation, and fundamental physics, we suggest the use of FSO Communication (FSOC) or laser communication (lasercom) links, leveraging high data-rate telecom technology, to enhance time and distance metrological performance, in complement to SLR systems. Rapid improvement on data-debit of ground-space lasercom link enable the use of 10 Gbps telecom signal to achieve an absolute, high sensitivity and accuracy time/distance measurement for ground-space link.My thesis focuses on the development, implementation, and characterization of a novel time/distance metrology technique based on FSOC link, "MetroCom". The MetroCom project relies on transmitting 10 Gbps modulated optical signals over free-space channel to achieve few tens of fs timing (few µm in distance) sensitivity over both short and long-term. A high-resolution absolute distance measurement is expected through a combination of two methods: phase measurement from an OOK (On-Off keying) configuration and Time-of-Flight (ToF) measurement via PRBS (Pseudo-Random Binary Sequence) modulation, generated by an advanced signal synthesizer STC with a low-cost SFP COTS fiber telecom module.After implementing a calibration sub-system, an indoor system characterization was performed. Several systematic errors were identified, modeled, and mitigated. A preliminary ground-to-ground experiment (MetroCom-I) was conducted between MeO telescope and a fixed target at Calern summit over a 2 × 2.5 km folded freespace path. The link, associated with a Tip-tilt stabilisation, is successfully established, achieving timing stability of a few tens of femtoseconds from sub-ms to second integration time. The results demonstrate an accurate characterization of atmospheric turbulence, with timing jitter consistent with turbulence theoretical models such as Greenwood-Tarazano, as well as long-term drift confirmed by propagation delay variations in agreement with refractive index fluctuation estimates. The work establishes MetroCom as a competitive and scalable FSOC-based technique for potential optical time/frequency transfer and provides a valid basis for future extensions toward ground-to-space links, supporting to the SLR community in meeting the GGOS performance target of sub-mm accuracy.
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Soutenance de thèse de Marylise Saffre – 15 decembre 2025
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« Développement d’une source cryogénique de molécules polyatomiques pour la spectroscopie moyen-infrarouge de très haute précision »
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La soutenance aura lieu à l'Université Sorbonne - Paris Nord
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Soutenance de thèse de Yuhao Liu – 17 decembre 2025
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« Cavity-enhanced sub-Doppler spectroscopy with an ultra-stable SI-traceable mid-infrared quantum cascade laser: signal-to-noise ratio considerations and precision measurements with methanol and ethylene »
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La soutenance aura lieu à l'Université Sorbonne - Paris Nord
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Soutenance de thèse de Josipa Madunic – 11 decembre 2025
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« Setup and preliminary characterization of a surface-electrode Paul trap for frequency metrology »
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La soutenance aura lieu à 10h à l'Amphithéâtre Transfer 2, SUPMICROTECH ENSMM - Besançon
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Soutenance de thèse de Jana Elbadawi – 16 decembre 2025
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« Theoretical and Experimental Developments for a Continuous Superradiant Laser »
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La soutenance aura lieu à 10h à l'Amphithéâtre Jules Haag, SUPMICROTECH ENSMM - Besançon
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Soutenance de thèse de Einstein Huayanay – 3 decembre 2025
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« L’oscillateur HBAR intégré à vieillissement contrôlé et faible consommation »
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La soutenance aura lieu à 14h à l'Amphithéâtre Jean-Jacques Gagnepain – Institut FEMTO-ST - Besançon
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Soutenaces passées
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Soutenance HDR de Clement Lacroute – 16 Octobre 2025
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« Cavités Fabry-Perot ultra-stables et pièges à ions à électrodes surfaciques pour la métrologie des fréquences optiques »
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Soutenance de thèse de Fatima Rahmouni – 25 septembre 2025
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« Development of an Optical Lattice Clock Based on Neutral Ytterbium: Towards Transportability and Chronometric Geodesy »
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La bourse de thèse de Fatima Rahmouni a été co-financé par FIRST-TF
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Christophe Salomon lauréat du Prix Balzan 2025
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Le physicien français Christophe Salomon a reçu le prix Balzan 2025 décerné par la Fondation Balzan pour ses travaux pionniers utilisant des atomes ultra-froids pour la fabrication d’horloges atomiques qui ont révolutionné la mesure du temps. (lien au site web CNRS)
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Lien au communique de presse de la Fondation Internationale Balzan. Le prix sera remis à Berne (Suisse) le 14 Novembre 2025
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Christophe Daussy (LPL), lauréat du prix Jean Perrin 2024
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Décerné par la Société Française de Physique, le prix Jean Perrin récompense un effort particulièrement réussi de popularisation de la Science. En 2021, avec le soutien de la Société Française d’Optique, Christophe Daussy, enseignant-chercheur au LPL, Université Sorbonne Paris Nord, a relancé un projet initialement débuté au sein de l’association Atouts Sciences en 2015, pour l’année internationale de la lumière. C’est ce projet de kit pédagogique, intitulé LightBox, qui a retenu l’attention du jury du prix Jean Perrin de la Société Française de Physique. FIRST-TF est partenaire du projet LightBox avec une contribution à son financement. (lien au site de la Société Française de Physique)
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Nouvel arrivant à FEMTO-ST
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Emmanuel Klinger, chargé de recherche CNRS section 10
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Nouvel arrivant à ARTEMIS
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Eleonora Pollini, chargée de recherche CNRS section 10
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Nouveaux arrivants à LPL
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Maël Abdelhak, ingenieur d'etudes su le projet T-REFIMEVE.
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Raphaël Hahn, chargé de recherche CNRS
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FORMATIONS
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APPELS D'OFFRES
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PARUS RÉCEMMENT
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N'oubliez pas de nous communiquer vos publications dans lesquelles FIRST-TF est remercié. A vos articles !
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Performance and uses of the Refimeve metrological signal, 1000 km from the source
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Mathieu Collombon, Etienne Cantin, Gaëtan Hagel, Paul Eric Pottie, Marie
Houssin and Caroline Champenois
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Journal of the Optical Society of America B Vol. 42, Issue 11, pp. 2429-2435 (2025)
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Abstract: We present a detailed analysis of the end-user performance of the metrological signal at 1542 nm disseminated by the French national fibre network Refimeve, about 1000 km from the source. By the mean of a local ultrastable laser at 729 nm and a frequency comb, we are able to carry out stability and phase noise measurements of the signal with respect to the local laser. With a focus on phase noise analysis we identify different timescales of interest for the use of this signal in optical frequency metrology.
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Locking noise in laser frequency stabilization to an optical fiber delay line
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Stéphanie Grabielle, Debanjan Show, Frédéric Audo, Jean-Pierre Coulon, Fabien Kéfélian
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Optics Express, 2025, 33 (16), pp.35028
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Postes de doctorat disponibles dans le réseau doctoral QuRIOUS MSCA sur les horloges quantiques optiques
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Plusieurs postes de doctorat sont rendus disponibles par le réseau doctoral QuRIOUS MSCA sur les horloges quantiques optiques: https://www.quriousclocks.eu/
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Projets disponibles
Poste R1-UvA: Continuous cavity enhanced Sr clocks – University of Amsterdam, NL
Poste R2-UvA: Multi-ensemble, zero-deadtime, non-demolition readout Sr clock – University of Amsterdam, NL
Poste R3-UoB: Compact vacuum chamber suitable for a transportable optical lattice clock operating at 5×10-18 – University of Birmingham, UK
Poste R4-UoB: Field deployable optical lattice clock with performance better than 1 part in 1016 – University of Birmingham, UK
Poste R5-CNRS: continuous superradiant emission on the 1S0 → 3P0 clock transition of ytterbium – FEMTO-ST, France
Poste R6-CNRS: Continuous-wave superradiant lasing from a cold-atom beam – Laboratoire de Physique des Lasers, France
Poste R7-CNRS: QND measurements in strontium optical lattice clocks in the classical and quantum regimes, Laboratoire Temps-Espace, France
Poste R8-UCPH: Testing the fundamental limits of superradiant lasers – University of Copenhagen, Denmark
Poste R9-INRIM: Engineering quantum states and metrology in hybrid cavity lattice clock – INRIM, Italy
Poste R10-UMK: Superradiant Sr clock with sequential loading – Nicolaus Copernicus University in Toruń, Poland
Poste R11-TUW: Theory and numerical simulations for the development of continuously operating clocks – Technische Universität, Wien, Austria
Poste R12-UIBK: Modeling and new operation modes of cavity enhanced optical clocks – University of Innsbruck, Austria
Poste R13-MEN: Development and future maturation of optical clocks based on hot atomic vapors or atomic beams - Menlo Systems, Germany
Poste R14-NKT: Tools for optical control of atomic clock transitions – NKT Photonics, Denmark
Poste R15-QUBIG: Compact light conditioning modules for the visible spectrum – QUBIG, Germany
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Conditions requises pour tous les postes
– Les candidats ne peuvent pas postuler à un poste dans un pays où ils ont vécu plus de 12 mois au cours des 3 dernières années.
– Date de début : entre octobre 2025 et avril 2026. (Discutez avec nous si vous souhaitez postuler, mais vous ne pouvez commencer que plus tard.)
– Pour les postes de doctorat expérimental, il est très avantageux d’avoir rédigé un mémoire de master en physique atomique, moléculaire ou optique expérimentale.
– Aucune condition de nationalité demandée
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CDD Ingénieur en développements instrumentaux à dominante électronique (H/F)
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CDD Ingénieur en développements instrumentaux à dominante électronique (H/F) pour l'équipe de recherche Métrologie, Molécules et tests Fondamentaux du LPL => More details
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Poste ouvert à FEMTO-ST (Besançon). Contrat post-doctoral
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Contrat post-doctoral, 1 an renouvelable. Équipe OHMS – Oscillateurs, Horloges, Métrologie et Systèmes. Activité: Horloges à microcellules
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Offre de contrat post-doctoral IDEX Université Côte d'Azur
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Pour abonner votre adresse à la liste de diffusion FIRST-TF, pour diffuser toute information intéressant la communauté FIRST-TF, pour toute question ou remarque, envoyez un e-mail à contact@first-tf.com.
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