Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Precision Measurements I (joint session Q/A)
Q 11.2: Vortrag
Montag, 11. März 2024, 17:15–17:30, HS 1221
A strontium optical clock based on Ramsey-Bordé spectroscopy — •Amir Mahdian1, Oliver Fartmann1, Ingmari C Tietje1, Martin Jutisz1, Conrad L Zimmermann2, Vladimir Schkolnik1,2, Marc Christ2, and Markus Krutzik1,2 — 1Humboldt-Universität zu Berlin, Institut für Physik — 2Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Berlin
We are developing a Ramsey-Bordé based optical atomic clock where the long-term stability relies on interrogating a stream of strontium atoms. Our choice of the clock transition is the 5s2 1S0 → 5s5p 3P1 intercombination line of Sr at 689 nm, targeting an Allan deviation as low as 2×10−15 between 100 s and 1000 s, and 10−15 for longer interogation times.
Following an overview of our atom interferometer’s current status, the latest developments in the power and frequency stability of the relevant lasers and a different readout mechanism will be presented. Additionally, I showcase the observation of Ramsey-Bordé fringes, accompanied by numerical simulations to aid in interpreting the signal. Moreover, I discuss the stability comparison of our atomic beam clock vs a Rb two-photon frequency reference.
This work is supported by the German Space Agency (DLR), with funds provided by the Federal Ministry for Economic Affairs and Climate Action (BMWK) under grant number DLR50WM1852, and by the German Federal Ministry of Education and Research (BMBF) within the program quantum technologies - from basic research to market under grant number 13N15725.