SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 59: Poster IV
Q 59.35: Poster
Thursday, March 9, 2023, 16:30–19:00, Empore Lichthof
Progress on PTB’s transportable Al+ ion clock — •Constantin Nauk1, Benjamin Kraus1,2, Joost Hinrichs1,3, Simone Callegari1, Stephan Hannig1,2, and Piet O. Schmidt1,2,3 — 1Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany — 2DLR-Institute for Satellite Geodesy and Inertial Sensing, 30167 Hannover, Germany — 3Leibniz Universität Hannover, Institut für Quantenoptik, 30167 Hannover, Germany
Optical atomic clocks achieve fractional systematic and statistical frequency uncertainties on the order of 10−18. This enables novel applications, such as height measurements in relativistic geodesy with ∼ 1 cm resolution for earth monitoring. Towards this goal, we set up a transportable clock based on the 1S0 → 3P0 transition in 27Al+. A co-trapped 40Ca+ ion allows state detection and cooling via quantum logic spectroscopy and sympathetic cooling.
We present the design and the current status of the transportable apparatus, review the recent development of the laser systems and show particularly the performance of the UV clock laser setup operating at 267.4 nm with a fractional frequency uncertainty of 10−16 at 1 second.