Anne Amy-Klein

UNIVERSITY PROFESSOR

Bureau: D015, Campus Villetaneuse

Research group website
Laboratory website

My research background:

I am a physics professor at the Laboratoire de Physique des Lasers, and director of this laboratory since 2019. I did a thesis on resonant wave mixing in gaseous atomic media, then became an associate professor and studied spectroscopy of atoms in the vicinity of dielectric surfaces. I then joined the LPL’s Metrology, Molecules and Fundamental Tests team, which focuses on precision measurements, in particular ultra-high resolution spectroscopy of molecules. The aim is to discover new physical effects beyond current theories, by comparing ultra-precise measurements with the values expected by the various existing physical models.

I’m currently working on the dissemination of ultra-stable frequency signals via optical fibers and the development of the REFIMEVE national research infrastructure. This opens up a wide range of applications, including clock comparisons, fundamental physics tests, and quantum communications.

Courses taught:

  • Physique Quantique 2 : Formalisme de la physique quantique

Research themes:

  • Molecular spectroscopy
  • Dissemination of ultrastable time and frequency signals
Tuning of the position of a crystal in an optical setup for sum-frequency generation.

A few selected articles

  • M. Schioppo, J. Kronjäger, A. Silva, R. Ilieva, J. W. Paterson, C. F. A. Baynham, W. Bowden, I. R. Hill, R. Hobson, A. Vianello, M. Dovale-Álvarez, R. A. Williams, G. Marra, H. S. Margolis, A. Amy-Klein, O. Lopez, E. Cantin, H. Álvarez-Martínez, R. Le Targat, P. E. Pottie, N. Quintin, T. Legero, S. Häfner, U. Sterr, R. Schwarz, S. Dörscher, C. Lisdat, S. Koke, A. Kuhl, T. Waterholter, E. Benkler, and G. Grosche, «Comparison of ultrastable lasers at 7×10-17 fractional frequency instability through a 2,220 km long optical fibre link network», Nat. Comm. 13, 212 (2022).
    DOI: 10.1038/s41467-021-27884-3
  • E. Cantin, M. Tønnes, R. Le Targat, A. Amy-Klein, O. Lopez, P.-E. Pottie, «An accurate and robust metrological network for coherent optical frequency dissemination», New J. Phys. 23, 053027 (2021).
    DOI: 10.1088/1367-2630/abe79e
  • B. Argence, B. Chanteau, O. Lopez, D. Nicolodi, M. Abgrall, C. Chardonnet, C. Daussy, B. Darquié, Y. Le Coq and A. Amy-Klein, «Quantum cascade laser frequency stabilization at the sub-Hz-level», Nature Photon 9, 456 (2015).
    DOI: 10.1038/nphoton.2015.93
72 documents

  • Neelam Yadav, Philip Tuckey, Michel Abgrall, P.-E Pottie, Etienne Cantin, et al.. Precise Time Calibration and Deployments of White Rabbit Switches for T-Refimeve. Time and Frequency Seminar of Laboratoire Temps-Espace (LTE), 11 DEC 2025, Observatoire de Paris France, Dec 2025, Paris, France. ⟨hal-05520177⟩
  • Neelam Yadav, Philip Tuckey, Michel Abgrall, P.-E Pottie, Etienne Cantin, et al.. Automated Parallel Precise Time Calibration of White Rabbit Switches for T-Refimeve. REFIMEVE General Assembly 2025, Dec 2025, Grenoble, France. ⟨hal-05501105⟩
  • Neelam Yadav, Philip Tuckey, Michel Abgrall, Anne Amy-Klein, Christian Chardonnet, et al.. Automated Simultaneous Precise Time Calibration of White Rabbit Switches for REFIMEVE. First-TF Annual Meeting 2025, Workshop "Application of Time-Frequency technologies to defence and space"., Oct 2025, Campus Beaulieu - Rennes University, Rennes, France. ⟨hal-05500940⟩
  • Neelam Yadav, Philip Tuckey, Michel Abgrall, P.-E Pottie, Anne Amy-Klein, et al.. Instrumental Delay Calibration of White Rabbit Switches for Sub-10 ns Timing in the REFIMEVE Network. 14 th White Rabbit Workshop, Jun 2025, Geneva, Switzerland. ⟨hal-05501433⟩
  • Thomas Lindvall, Marco Pizzocaro, Rachel Godun, Michel Abgrall, Daisuke Akamatsu, et al.. Coordinated international comparisons between optical clocks connected via fiber and satellite links. Optica, 2025, 12 (6), pp.843. ⟨10.1364/OPTICA.561754⟩. ⟨hal-05157072⟩
  • Dang Bao An Tran, Mathieu Manceau, Olivier Lopez, Andrey Goncharov, Anne Amy-Klein, et al.. Extending frequency metrology to increasingly complex molecules: SI-traceable sub-Doppler mid-IR spectroscopy of trioxane. 2025. ⟨hal-04939697⟩
  • D B A Tran, O. Lopez, M. Manceau, A. Goncharov, M. Abgrall, et al.. Near- to mid-IR spectral purity transfer with a tunable frequency comb: Methanol frequency metrology over a 1.4 GHz span. APL Photonics, 2024, 9 (3), ⟨10.1063/5.0170227⟩. ⟨hal-04797936v2⟩
  • C Clivati, M Pizzocaro, E K Bertacco, S Condio, G A Costanzo, et al.. Coherent Optical-Fiber Link Across Italy and France. Physical Review Applied, 2022, ⟨10.1103/PhysRevApplied.18.054009⟩. ⟨hal-03838736⟩
  • Mads Bebe Krog Tønnes, Frédéric Schuller, Etienne Cantin, Olivier Lopez, Rodolphe Le Targat, et al.. Coherent fiber links operated for years: effect of missing data. Metrologia, 2022, 59, ⟨10.1088/1681-7575/ac938e⟩. ⟨hal-03838745⟩
  • M. Schioppo, J. Kronjäger, A. Silva, R. Ilieva, J. W Paterson, et al.. Comparing ultrastable lasers at 7 × 10−17 fractional frequency instability through a 2220 km optical fibre network. Nature Communications, 2022, 13 (1), pp.212. ⟨10.1038/s41467-021-27884-3⟩. ⟨hal-03528135⟩

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