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.
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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)