A single ion coupled to a UV fiber-cavity

Trapped ions offer long trapping and coherence times, which is why they are of great interest for the use as stationary qubits in a quantum network. Here we investigate the integration of fiber based cavities into ion traps, which due to their small mode volume and direct coupling to a single mode fiber present an efficient interface between single ions and single photons. In the past, ions and fiber-cavities have been successfully combined in the infra-red spectral range. Since ions typically have their strongest dipole transition in the ultra-violet (UV), the extension of fiber cavities to work in the UV is necessary. We will present our latest results on trapping Ytterbium ions inside approximately 150 micro-meter long fiber-cavities, which are resonant with the S-P electric dipole transition at 370nm.