High Power CW Thin-Disk Laser with good Beam Quality

Kurzfassung

The thin-disk laser concept is a good candidate for high power, high brilliant laser sources. However, scaling thin disk lasers beyond 1 kW while maintaining close to fundamental mode remains challenging. Here we present a thin-disk laser operating in the kW regime with good beam quality (M² < 2.5). The laser resonator is set up in an N-type configuration consisting of two curved mirrors, the thin-disk and an output coupler. The resonator is evacuated to reduce effects of disturbed air on the laser operation. The influence of the fundamental mode radii on the beam quality is investigated.