Düsseldorf 2007 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 64: Poster Quantengase

Q 64.19: Poster

Donnerstag, 22. März 2007, 16:30–18:30, Poster C

Towards an atom laser by all-optical means for Atom Interferometry — •Maic Zaiser, Waldemar Herr, Christian Schubert, Tobias Müller, Michael Gilowski, Thijs Wendrich, Wolfgang Ertmer, and Ernst Maria Rasel — Institut für Quantenoptik, Universität Hannover, Welfengarten 1, 30167 Hannover

We present the current status of our all-optical ATom LASer (ATLAS), an experiment aiming at Bose-Einstein-Condensation (BEC) in a dilute atomic gas of ⁸⁷Rb by all-optical means. The project is motivated by the ultra-low temperatures feasible in a BEC which may improve the accuracy of matter wave interferometers for precision measurements. Optical dipole traps make a fast production of BEC possible allowing for a high repetition rate in an interferometer. Dipole traps also allow for the trapping of all m_F-substates, especially m_F=0, being intrinsically very insensitive to magnetic noise.

The atomic source consists of a two-stage design, where a three dimensional magneto-optical trap (3D-MOT) is loaded by a 2D-MOT. We present the experimental setup consisting of a specially designed and very compact vacuum chamber and a compact laser system for atom cooling employing modular integrated and fiber-based optics allowing for a high stability of the system. We will also give a characterization of our 2D- and 3D-MOT. In the future we will investigate the suitability of a high power Thulium fiber laser at 2 µm wavelength for trapping and evaporatively cooling atoms to quantum degeneracy. This work is part of the project FINAQS funded by the European Union. (www.finaqs.uni-hannover.de)