[1] Helmholtz Institute Jena, Jena,07743, Germany
[2] Max-Planck-Institut für Quantenoptik, Garching,D-85748, Germany
[3] Institute for Computational and Plasma Physics, Ludwig-Maximilian-Universitaet, Muenchen, Muenchen,80333, Germany
[4] Institute for Quantumoptics, University of Jena, Jena,07743, Germany