Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 56: Precision Spectroscopy of Atoms and Ions V (joint session A/Q)
Q 56.6: Vortrag
Donnerstag, 13. März 2025, 12:30–12:45, KlHS Mathe
Transportable optical clock for remote comparisons — •Saaswath J. K.1, Martin Steinel1, Melina Filzinger1, Jian Jiang1, Thomas Fordell2, Kalle Hanhijärvi2, Anders Wallin2, Thomas Lindvall2, Burghard Lipphardt1, Ekkehard Peik1, Nils Huntemann1, and the Opticlock consortium1 — 1Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 2VTT Technical Research Centre of Finland Ltd, National Metrology Institute VTT MIKES, P.O. Box 1000, 02044 VTT, Finland
We report on a transportable and user-friendly optical clock that uses the 2S1/2−2D3/2 transition of a single trapped 171Yb+ ion at 436 nm as the reference. The system, called Opticlock, has been developed in an industry-lead collaboration. As a first step towards remote comparisons, the frequency instability of Opticlock has been improved by reducing the dead time, and its systematic uncertainty has been reduced by direct measurements of the AC magnetic field. Furthermore, a frequency comb was integrated into the system to provide clock output at 1.5 µm. In August 2024, Opticlock traveled to Finland to be compared with the 88Sr+ clock at VTT MIKES. A first inspection of the measurement data, with an overall uptime of 90 %, indicates proper operation of both clocks and will allow the frequency ratio to be determined with a statistical uncertainty below 1×10−17. The results pave the way for future key comparisons of high-performance optical clocks using transportable standards as an alternative to satellite-based techniques and fiber links, yielding significant contributions to the milestones towards the redefinition of the SI second.
Keywords: Optical clocks; Trapped ions; Frequency comb; Transportable atomic clock; Ytterbium spectroscopy