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…