Stuttgart 2012 – scientific programme

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A: Fachverband Atomphysik

A 51: Materiewellenoptik

A 51.7: Talk

Friday, March 16, 2012, 15:30–15:45, V53.01

High resolution Sagnac atom interferometer — •Peter Berg, Christian Schubert, Gunnar Tackmann, Sven Abend, Wolfgang Ertmer, and Ernst M. Rasel — Institut für Quantenoptik, Leibniz Universität Hannover

Within the gyroscope experiment CASI (Cold Atom Sagnac Interferometer), a compact dual cold-atom interferometer for high resolution measurement of slow rotations is realised. Employing three separate beam-splitter light fields an area of 19 mm² is enclosed. We discuss the high demands of the relative beam-splitter light field alignment at the position of the atoms, which excludes standard optical alignment techniques. These are met by an alignment technique utilising the interferometer itself. The resulting gyroscope resolution of 5.3 10⁻⁷rad/s/√Hz is mainly limited by environmental vibrations. This work is supported by the DFG, the cluster of excellence QUEST, and IQS.