48 citations · 48 across the 1 of their papers we have counts for
4 papers
Rydberg excitation of a single trapped ion
T. Feldker, P. Bachor, M. Stappel +4
We demonstrate excitation of a single trapped cold Ca ion to Rydberg levels by laser radiation in the vacuum-ultraviolet at 122 nm wavelength. Observed resonances are id…
A continuous wave 10 W cryogenic fiber amplifier at 1015 nm and frequency quadrupling to 254 nm
R. Steinborn, A. Koglbauer, P. Bachor +4
A stable, continuous wave, single frequency fiber amplifier system at 1015 nm with 10W output power is presented. It is based on a large mode double clad fiber cooled to liquid nit…
Mode shaping in mixed ion crystals of 40Ca2+ and 40Ca+
T. Feldker, L. Pelzer, M. Stappel +5
We present studies of mixed Coulomb crystals of 40Ca+ and 40Ca2+ ions in a linear Paul trap. Doubly charged ions are produced by photoionisation of trapped 40Ca+ with a vacuum ultr…
High power, continuous-wave, single frequency fiber amplifier at 1091 nm and frequency doubling to 545.5 nm
M. Stappel, R. Steinborn, D. Kolbe +1
We present a high power single-frequency ytterbium fiber amplifier system with an output power of 30 W at 1091 nm. The amplifier system consists of two stages, a preamplifier stage…