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Q: Fachverband Quantenoptik und Photonik

Q 27: Poster Quantengase

Q 27.3: Poster

Dienstag, 11. März 2008, 16:30–19:00, Poster C2

Atom Laser by all-optical means for Atom Interferometry — •Maic Zaiser, Temmo Wübbena, Stefan Jöllenbeck, Wolfgang Ertmer, and Ernst Maria Rasel — Leibniz Universität 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 possible improvements of the accuracy of matter-wave interferometers based on quantum degenerated atoms. Optical dipole traps allow a high repetition rate in an interferometer and are also able to trapp all m_F-substates, especially m_F=0, which is in the first order insensitive to magnetic fields. We investigate the potential of such an atomic source for precision atom interferometers, such as the Cold Atom Sagnac Interferometer (CASI) [1] currently being set up in Hanover.

The atomic source consists of a three dimensional magneto-optical trap (3D-MOT) loaded by a 2D-MOT. We present the very compact vacuum chamber and a compact laser system for atom cooling employing modular integrated and fiber-based optics ensuring a high stability of the system. We will discuss 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)

[1] Versatile compact atomic sources for high resolution dual atom interferometry; T. Müller, T. Wendrich, M. Gilowski, C. Jentsch, E.M. Rasel, W. Ertmer Phys. Rev. A, in press.