Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie
Q 57.108: Poster
Donnerstag, 17. März 2011, 16:30–19:30, P1
A compact Yb optical lattice clock — •Charbel Abou Jaoudeh, Gregor Mura, Tobias Franzen, Taner Esat, Cristian Bruni, and Axel Görlitz — Institut für Experimentalphysik, Universitätstr. 1, 40225 Düsseldorf
Optical clocks using neutral atoms hold the promise to eventually reach an inaccuracy at a level of 10−18. Here we report on the development of a transportable source of ultracold Yb atoms for an optical lattice clock. All laser systems in the compact apparatus are diode-based. We have already implemented the first cooling stage using blue laser diodes at 399 nm and realized a magnetooptical trap (MOT) with more than 107 atoms. Successful transfer of 20 % from the bosonic 174Yb and fermionic 171Yb MOT into the second stage MOT operating on the narrow 61S0 → 63P1 transition at 556 nm and further cooling of the atoms to temperatures of 20 µK has also been achieved. The next step will be to load the atoms into a 1D optical lattice at the magic wavelength of 759 nm which is formed in a resonator inside the vacuum chamber. The special design of the lattice setup allows for a large-volume optical lattice with a diameter of 155 µm and a potential depth of 300 µK if 300 mW of radiation from a tapered diode laser are coupled into the resonator.