JRP publishable report

JRP publishable summary

Presentations given at final workshop on 'Optical clocks: quantum engineering and international timekeeping'

Talks

Fritz Riehle, Towards a redefinition of the SI second by optical clocks: Achievements and challenges

Helen Margolis, Overview of the ITOC project

Franziska Riedel, Remote optical and fountain clock comparison using broadband TWSTFT and GPS PPP

Posters

Metrological characterization of the INRIM Yb lattice clock, B. Rauf, M. Pizzocaro, P. Thoumany, G. Milani, G. Bolognesi, F. Bregolin, M. Gozzelino, F. Levi and D. Calonico

PTB's transportable strontium lattice clock, Stefan Vogt, Jacopo Grotti, Silvio Koller, Sebastian Häfner, Sofia Herbers and Christian Lisdat

Determination of optimized frequency and frequency ratio values from over-determined sets of clock comparison data, Helen Margolis and Patrick Gill

Satellite link performance for optical clock comparison, Franziska Riedel, Erik Benkler, Dirk Piester, Julia Leute, Joseph Achkar, Pacôme Delva, Ilaria Sesia, Giancarlo Cerretto, Massimiliano Rotondo, Peter B. Whibberley, Setnam Shemar, Helen S. Margolis and Pascale Defraigne

Evaluation of relativistic effects in two-way satellite time and frequency transfer, Setnam Shemar, Andrew Lamb and Fiona Rust

Gravity potential for optical clock comparisons, Heiner Denker, Ludger Timmen and Christian Voigt

Time-variable components of the gravity potential field, Christian Voigt, Heiner Denker and Ludger Timmen

Relativistic corrections for time and frequency transfer in optical fibres, Jan Gersl, Pacôme Delva and Peter Wolf

Publications

• J. Lodewyck, S. Bilicki, E. Bookjans, J.-L. Robyr, C. Shi, G. Vallet, R. Le Targat, D. Nicolodi, Y. Le Coq, J. Guéna, M. Abgrall, P. Rosenbusch and S. Bize, Optical to microwave clock frequency ratios with a nearly continuous strontium optical lattice clock, Metrologia, 53, pp 1123-1130 (2016)
• R. Tyumenev, M. Favier, S. Bilicki, E. Bookjans, R. Le Targat, J. Lodewyck, D. Nicolodi, Y. Le Coq, M. Abgrall, J. Guéna, L. De Sarlo and S. Bize, Comparing a mercury optical lattice clock with microwave and optical frequency standards, arXiv:1603.02026 (2016)
• C. Lisdat, G. Grosche, N. Quintin, C. Shi, S. M. F. Raupach, C. Grebing, D. Nicolodi, F. Stefani, A. Al-Masoudi, S. Dôrscher, S. Häfner, J.-L. Robyr, N. Chiodo, S. Bilicki, E. Bookjans, A. Koczwara, S. Koke, A. Kuhl, F. Wiotta, F. Meynadier, E. Camisard, M. Abgrall, M. Lours, T. Legero, H. Schnatz, U. Sterr, H. Denker, C. Chardonnet, Y. Le Coq, G. Santarelli, A. Amy-Klein, R. Le Targat, J. Lodewyck, O. Lopez, P.-E. Pottie, A clock network for geodesy and fundamental science, Nature Communications, 7, 12443 (2016)
• H. S. Margolis and P. Gill, Determination of optimized frequency and frequency ratio values from over-determined sets of clock comparison data, Journal of Physics: Conference Series 723, 012060 (2016)
• P. Gill, Is the time right for a redefinition of the second by optical atomic clocks?, Journal of Physics: Conference Series 723, 012053 (2016)
• S. Vogt, S. Häfner, J. Grotti, S. Koller, A. Al-Masoudi, U. Sterr and C. Lisdat, A transportable optical lattice clock, Journal of Physics: Conference Series 723, 012020 (2016)
• L. De Sarlo, M. Favier, R. Tyumenev and S. Bize, A mercury optical lattice clock at LNE-SYRTE, Journal of Physics: Conference Series 723, 012017 (2016)
• C. Grebing, A. Al-Masoudi, S. Dörscher, S. Häfner, V. Gerginov, S. Weyers, B. Lipphardt, F. Riehle, U. Sterr and C. Lisdat, Realization of a timescale with an accurate optical lattice clock, Optica, 3, 563–569 (2016)
• M. Abgrall, B. Chupin, L. De Sarlo, J. Guéna, P. Laurent, Y. Le Coq, R. Le Targat, J. Lodewyck, M. Lours, P. Rosenbusch, G. D. Rovera and S. Bize, Atomic fountains and optical clocks at SYRTE: Status and perspectives, Comptes Rendus Physique, 16, 461–470 (2015)
• A. Al-Masoudi, S. Dörscher, S. Häfner, U. Sterr, C. Lisdat, Noise and instability of an optical lattice clock, Phys. Rev. A, 92, 063814 (2015)
• H. S. Margolis, P. Gill, Least-squares analysis of clock comparison data to deduce optimized frequency and frequency ratio values, Metrologia, 52, pp 628-634 (2015)
• E. Benkler, C. Lisdat, U. Sterr, On the relation between uncertainties of weighted frequency averages and the various types of Allan deviations, Metrologia, 52, pp 565-574 (2015)
• J. Geršl, P. Delva, P. Wolf, Relativistic corrections for time and frequency transfer in optical fibres, Metrologia, 52, pp 552-564 (2015)
• S. Häfner, S. Falke, C. Grebing, S. Vogt, T. Legero, M- Merimaa, C. Lisdat, U. Sterr, 8 × 10^-17 fractional laser frequency instability with a long room-temperature cavity, Optics Letters, 40, p 2112-2115 (2015)
• T. Ido, M. Fujieda, H. Hachisu, S. Nagano, T. Gotoh, St. Falke, N. Huntemann, C. Grebing, B. Lipphardt, Ch. Lisdat, and D. Piester, Direct frequency comparison of intercontinentally separated Sr lattice clocks using carrier-phase two-way satellite frequency transfer, Proceedings of the 2014 IEEE International Frequency Control Symposium (2014)
• H. Hachisu, M. Fujieda, S. Nagano, T. Gotoh, A. Nogami, T. Ido, S. Falke, N. Huntemann, C. Grebing, B. Lipphardt, C. Lisdat and D. Piester, Direct comparison of optical lattice clocks with an intercontinental baseline of 9000 km, Optics Letters, 39, pp 4072-4075 (2014)
• S. Falke, N. Lemke, C. Grebing, B. Lipphardt, S. Weyers, V. Gerginov, N. Huntemann, C. Hagemann, A. Al-Masoudi, S. Häfner, S. Vogt, U. Sterr and C. Lisdat, A strontium lattice clock with 3x10^-17 inaccuracy and its frequency, New Journal of Physics, 16, p 072023 (2014)
• M. Pizzocaro, D. Calonico, P. Cancio Pastor, J. Catani, G. A. Costanzo, F. Levi and L. Lorini, Efficient Frequency Doubling at 399 nm, Applied Optics, 53, 16, pp 3388-3392 (2014)
• H. Margolis, Timekeepers of the future, Nature Physics, 10, pp 82-83 (2014)
• H. S. Margolis, R. M. Godun, P. Gill, L. A. M. Johnson, S. L. Shemar, P. B. Whibberley, D. Calonico, F. Levi, L. Lorini, M. Pizzocaro, P. Delva, S. Bize, J. Achkar, H. Denker, L. Timmen, C. Voigt, S. Falke, D. Piester, C. Lisdat, U. Sterr, S. Vogt, S. Weyers, J. Gersl, T. Lindvall and M. Merimaa, International timescales with optical clocks (ITOC), Proceedings of the 2013 Joint European Frequency and Time Forum & International Frequency Control Symposium (EFTF/IFCS), pp 908-911 (2013)

Posters

• ITOC: International Timescales with Optical Clocks, H. S. Margolis et al, IFCS/EFTF 2015, 12-16 April 2015, Denver (USA)
• Least-squares analysis of clock comparison data to deduce optimized frequency and frequency ratio values, H. S. Margolis and P. Gill, 23-26 June 2014, Neuchâtel (Switzerland), EFTF
• 2013 Joint UFFC, EFTF and PFM Symposium
• IAG Scientific Assembly 2013

The research within this EURAMET joint research project receives funding from the European Community's Seventh Framework Programme, ERA-NET Plus, under Grant Agreement No. 217257.