Applying optical clocks in national and international timekeeping

Jacob Tunesi; An D. B. Tran; Adam O. Parsons; Alexandra Tofful; Billy I. Robertson; Matthew Y. H. Johnson; Chen-Hao Feng; Marco Schioppo; Anne E. Curtis; Ian R. Hill; Rachel M. Godun; Helen S. Margolis; Michel Abgrall; Baptiste Chupin; Pierre Uhrich; Luca Lorini; Rodolphe Le Targat; Benjamin Pointard; Jérôme Lodewyck

doi:10.1117/12.3012345

13 March 2024 Applying optical clocks in national and international timekeeping

Jacob Tunesi, An D. B. Tran, Adam O. Parsons, Alexandra Tofful, Billy I. Robertson, Matthew Y. H. Johnson, Chen-Hao Feng, Marco Schioppo, Anne E. Curtis, Ian R. Hill, Rachel M. Godun, Helen S. Margolis, Michel Abgrall, Baptiste Chupin, Pierre Uhrich, Luca Lorini, Rodolphe Le Targat, Benjamin Pointard, Jérôme Lodewyck

Author Affiliations +

Proceedings Volume PC12912, Quantum Sensing, Imaging, and Precision Metrology II; PC1291209 (2024) https://doi.org/10.1117/12.3012345
Event: SPIE Quantum West, 2024, San Francisco, California, United States

Abstract

We present NPL’s recent contributions to timekeeping applications of optical clocks. The first of these in-volves optical clocks at NPL and SYRTE being simultaneously used to steer experimental time scales, in a similar manner to Cs fountains steering the national time scales. The resulting optically-steered time scales at NPL and SYRTE (denoted UTCx(NPL) and UTCx(OP) respectively) will be presented along with compari-sons against both Coordinated Universal Time (UTC) and each other via satellite techniques. We will then present how optical clocks can be used in the evaluation and steering of International Atomic Time (TAI) and, subsequently, UTC – a feat which has recently been achieved by NPL’s Sr lattice optical clock. We will discuss the process by which this was achieved, and we will show the recent frequency data and analysis that has been used to perform recent calibrations of TAI.

Conference Presentation

Citation Download Citation

Jacob Tunesi, An D. B. Tran, Adam O. Parsons, Alexandra Tofful, Billy I. Robertson, Matthew Y. H. Johnson, Chen-Hao Feng, Marco Schioppo, Anne E. Curtis, Ian R. Hill, Rachel M. Godun, Helen S. Margolis, Michel Abgrall, Baptiste Chupin, Pierre Uhrich, Luca Lorini, Rodolphe Le Targat, Benjamin Pointard, and Jérôme Lodewyck "Applying optical clocks in national and international timekeeping", Proc. SPIE PC12912, Quantum Sensing, Imaging, and Precision Metrology II, PC1291209 (13 March 2024); https://doi.org/10.1117/12.3012345

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