A significant reduction of the influence of the thermal lens for high power laser operation could be achieved in a thin-disk laser by systematic characterization of the thin-disk laser medium and the utilization of a dynamically stable resonator. Furthermore, the power scalability of the thin-disk laser concept could be demonstrated with two disks in one resonator and with large pump spot radii, realizing an output power of approximately 1 kW with nearly diffraction limited beam quality.

© 2009 Optical Society of America

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