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Logo: Institut für Quantenoptik/Leibniz Universität Hannover
Logo Leibniz Universität Hannover
Logo: Institut für Quantenoptik/Leibniz Universität Hannover
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The Gyroscope CASI: Cold Atom Sagnac Interferometer

Atom interferometry has become a promising technique for high resolution measurements particularly in fundamental physics and for multidisciplinary applications.  Measurements of the gravity constant, Earth’s acceleration or tests of the equivalence principle are examples of ongoing experiments.  In the Institute of Quantum Optics a Cold Atom Sagnac Interferometer (CASI) is developed for the precise measurement of inertial forces, especially of rotations. We investigate different interferometer topologies and evaluate new atom optical technologies to realize a rotation sensor with a resolution better than 10-8rad/s/Hz1/2. One of our goals is to realize comparison campaigns for earth observation measurements with different state-of-the-art sensors world wide.

Fig. 1: Scheme of our atom interferometer. Lasers for cooling, preparing and detecting the atoms (blue) as well as the beam splitting lasers (red) and the magnetic coils (brown) are displayed.
Fig.: Scheme of our atom interferometer. Lasers for cooling, preparing and detecting the atoms (blue) as well as the beam splitting lasers (red) and the magnetic coils (brown) are displayed.

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Article

P. Berg, S. Abend, G. Tackmann, C. Schubert, E. Giese, W. P. Schleich, F. A. Narducci, W. Ertmer, and E. M. Rasel (2015): Composite-Light-Pulse Technique for High-Precision Atom Interferometry, Phys. Rev. Lett. 114, 063002 (2015)
DOI: 10.1103/PhysRevLett.114.063002