Quantentechnologie

This master thesis describes a setup for optically exciting Rubiduim 87 atoms to Rydberg states. A two photon scheme is implemented to transfer atoms from the ground state to the Rydberg state, using laser light at 780 nm and 480 nm. In order to achieve the required short and long term stability, the diode laser at 780 nm is locked to an Ultra Low Expansion (ULE) glass cavity, which is placed inside vacuum, vibrationally isolated and thermally stabilized. Laser light at 480 nm is produced by frequency doubling light from a 960 nm laser, using a BIBO crystal inside an enhancement cavity. We have demonstrated the systems ability to address Rydberg states in 87 Rb, by performing Electromagnetically Induced Transparency (EIT) spectroscopy in a room temperature vapor cell. In the future EIT can be used for the locking of the 480 nm laser via frequency modulation spectroscopy.