First international comparison of fountain primary frequency standards via a long distance optical fiber link

verfasst von
J. Guéna, S. Weyers, M. Abgrall, C. Grebing, V. Gerginov, P. Rosenbusch, S. Bize, B. Lipphardt, H. Denker, N. Quintin, S. M.F. Raupach, D. Nicolodi, F. Stefani, N. Chiodo, S. Koke, A. Kuhl, F. Wiotte, F. Meynadier, E. Camisard, C. Chardonnet, Y. Le Coq, M. Lours, G. Santarelli, A. Amy-Klein, R. Le Targat, O. Lopez, P. E. Pottie, G. Grosche
Abstract

We report on the first comparison of distant caesium fountain primary frequency standards (PFSs) via an optical fiber link. The 1415 km long optical link connects two PFSs at LNESYRTE (Laboratoire National de métrologie et d'Essais-SYstème de Références Temps- Espace) in Paris (France) with two at PTB (Physikalisch-Technische Bundesanstalt) in Braunschweig (Germany). For a long time, these PFSs have been major contributors to accuracy of the International Atomic Time (TAI), with stated accuracies of around 3×10-16. They have also been the references for a number of absolute measurements of clock transition frequencies in various optical frequency standards in view of a future redefinition of the second. The phase coherent optical frequency transfer via a stabilized telecom fiber link enables far better resolution than any other means of frequency transfer based on satellite links. The agreement for each pair of distant fountains compared is well within the combined uncertainty of a few 10-16 for all the comparisons, which fully supports the stated PFSs' uncertainties. The comparison also includes a rubidium fountain frequency standard participating in the steering of TAI and enables a new absolute determination of the 87Rb ground state hyperfine transition frequency with an uncertainty of 3.1×10-16.

Organisationseinheit(en)
Institut für Erdmessung
Externe Organisation(en)
Observatoire de Paris (OBSPARIS)
Physikalisch-Technische Bundesanstalt (PTB)
National Institute of Standards and Technology (NIST)
Universite Paris 13
Universite de Bordeaux
Réseau National de télécommunications pour la Technologie l’Enseignement et la Recherche (RENATER)
Typ
Artikel
Journal
METROLOGIA
Band
54
Seiten
348-354
Anzahl der Seiten
7
ISSN
0026-1394
Publikationsdatum
06.2017
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Ingenieurwesen (insg.)
Elektronische Version(en)
https://arxiv.org/pdf/1703.02892.pdf (Zugang: Offen)
https://hal.archives-ouvertes.fr/hal-01487651/file/Fountain%20com%20Version%20r%C3%A9vis%C3%A9e.pdf (Zugang: Offen)
https://doi.org/10.1088/1681-7575/aa65fe (Zugang: Offen)
 

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