SAMOP 2023 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 20: Poster II
A 20.29: Poster
Mittwoch, 8. März 2023, 16:30–19:00, Empore Lichthof
An Atomic Source for an Ytterbium Optical Lattice Clock — •Julian Pick1, Lion Günster1, and Carsten Klempt1,2 — 1Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover — 2Institut für Satellitengeodäsie und Inertialsensorik, Deutsches Zentrum für Luft-und Raumfahrt e.V., Callinstraße 30b, 30167 Hannover
Optical lattice clocks based on neutral ytterbium atoms belong to today’s most precise frequency standards. Clock operation requires ultracold atoms trapped in an optical lattice, which demands the implementation of laser cooling techniques. In our setup, an atomic ytterbium beam emerges from an oven at a temperature of 500 ∘C. The atoms are decelerated by a transversal-field permanent-magnet Zeeman slower and subsequently redirected and recollimated by a 2D magneto-optical trap (MOT), for loading into a 3D MOT.
The cooling light at 399 nm operating at the 1S0−1P1 transition is generated by two frequency-doubled external cavity diode lasers, of which the fundamental wavelengths are used for frequency stabilization. The primary laser is stabilized to an ultrastable optical resonator using the electronic sideband locking method. The secondary laser is stabilized to the primary laser with a frequency offset lock.
I will present the setup of the ytterbium source and the laser frequency stabilization scheme, as well as a characterization of the atomic flux and its velocity distribution behind the 2D MOT.