Frequency comparison of 171Yb+ ion optical clocks at PTB and NPL via GPS PPP

Leute, Julia; Huntemann, Nils; Lipphardt, Burghard; Tamm, Christian; Nisbet-Jones,, P. B. R.; King, S. A.; Godun, R. M.; Jones, J. M.; Margolis, H. S.; Whibberley, P. B.; Wallin, A.; Merimaa, M.; Gill, P.; Peik, Ekkehard

doi:https://doi.org/10.1109/tuffc.2016.2524988

Zugriffsnummer	36688
Dokumenttyp	Zeitschriftenartikel
Peer Review	unbekannt
Sprache	Englisch
Titel	Frequency comparison of ¹⁷¹Yb⁺ ion optical clocks at PTB and NPL via GPS PPP
Autor(in); Institution	Leute, Julia; 4.4, Zeit und Frequenz, PTB-Braunschweig Huntemann, Nils; 4.4, Zeit und Frequenz, PTB-Braunschweig Lipphardt, Burghard; 4.4, Zeit und Frequenz, PTB-Braunschweig Tamm, Christian; 4.4, Zeit und Frequenz, PTB-Braunschweig Nisbet-Jones,, P. B. R.; National Physical Laboratory (NPL), Teddington, UK King, S. A.; National Physical Laboratory (NPL), Teddington, UK Godun, R. M.; National Physical Laboratory (NPL), Teddington, UK Jones, J. M.; National Physical Laboratory (NPL), Teddington, UK Margolis, H. S.; National Physical Laboratory (NPL), Teddington, UK Whibberley, P. B.; National Physical Laboratory (NPL), Teddington, UK Wallin, A.; MIKES Metrology, VTT Technical Research Centre of Finland Ltd., Espoo, FINLAND Merimaa, M.; MIKES Metrology, VTT Technical Research Centre of Finland Ltd., Espoo, FINLAND Gill, P.; National Physical Laboratory (NPL), Teddington, UK Peik, Ekkehard; 4.4, Zeit und Frequenz, PTB-Braunschweig
Quelle/Jahr	IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control: 63 (2016), 7, 981 - 985
ISSN	0885-3010 (PRINT) ; 1525-8955 (ONLINE)
DOI	https://doi.org/10.1109/tuffc.2016.2524988
Verlag	New York, NY: IEEE
Freie Schlagworte	Frequency comparison ; optical clocks ; GPS ; PPP (precise point positioning)
Zusammenfassung	We used precise point positioning, a well-established GPS carrier-phase frequency transfer method to perform a direct remote comparison of two optical frequency standards based on single laser-cooled ¹⁷¹Yb⁺ ions operated at the National Physical Laboratory (NPL), U.K. and the Physikalisch-Technische Bundesanstalt (PTB), Germany. At both institutes, an active hydrogen maser serves as a flywheel oscillator which is connected to a GPS receiver as an external frequency reference and compared simultaneously to a realization of the unperturbed frequency of the ²S_1/2(F = 0) - ²D_3/2(F = 2) electric quadrupole transition in ¹⁷¹Yb⁺via an optical femtosecond frequency comb. To profit from long coherent GPS-link measurements, we extrapolate the fractional frequency difference over the various data gaps in the optical clock to maser comparisons which introduces maser noise to the frequency comparison but improves the uncertainty from the GPS-link instability. We determined the total statistical uncertainty consisting of the GPS-link uncertainty and the extrapolation uncertainties for several Extrapolation schemes. Using the extrapolation scheme with the smallest combined uncertainty, we find a fractional frequency difference y(PTB) - y(NPL) of -1.3 × 10^-15 with a combined uncertainty of 1.2 × 10^{-15.nosup for a total measurement time of 67 h. This result is consistent with an agreement of the frequencies realized by both optical clocks and with recent absolute frequency measurements against caesium fountain clocks within the corresponding uncertainties.}

Zitierung

Leute, J., Huntemann, N., Lipphardt, B., Tamm, C., Nisbet-Jones,, P. B. R., King, S. A., Godun, R. M., Jones, J. M., Margolis, H. S., Whibberley, P. B., Wallin, A., Merimaa, M., Gill, P., & Peik, E. (2016). Frequency comparison of ¹⁷¹Yb⁺ ion optical clocks at PTB and NPL via GPS PPP. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 63(7), 981–985. https://doi.org/10.1109/tuffc.2016.2524988

Exportieren

RIS BibTeX

Zitierung

Exportieren

PTB-Publica Menü