Stuttgart 2012 – wissenschaftliches Programm
Q 34.80: Poster
Dienstag, 13. März 2012, 16:30–19:00, Poster.I+II
A resonator-based optical lattice setup for an Yb clock — •Tobias Franzen, Charbel Abou Jaoudeh, Gregor Mura, and Axel Görlitz — Institut für Experimentalphysik, HHU Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf
Optical lattice clocks based on rare earths are expected to eventually reach an inaccuracy at a level of 10−18. While promising results have already been obtained on several stationary setups using Sr and Yb, transportable clocks are desirable for both performance evaluation and applications. For the realization of a transportable Yb clock, we are developing a compact, diode laser based atom source.
A key component of our setup is a resonator-based optical lattice at the magic wavelength for Yb. Resonant enhancement of the trapping light in an intravacuum optical cavity allows us to create sufficiently deep traps (several 100 µK) with a high volume (several 100 µm diameter) using a standard diode laser system (∼ 500 mW). A large trap volume enables the loading of a substantial portion of the MOT into the lattice and is thus beneficial for future clock performance due to a larger available atom number.
We present a versatile setup for the evaluation of different large volume lattice geometries in our clock apparatus, demonstrate the efficient transfer from the postcooling MOT into a one-dimensional optical lattice at the magic wavelength and characterize the system with regard to clock operation.