700W intracavity-frequency doubled Yb:YAG thin-disk laser at 100 kHz repetition rate

Christian Stolzenburg; Wolfgang Schüle; Ivo Zawischa; Alexander Killi; Dirk Sutter

doi:10.1117/12.840875

17 February 2010 700W intracavity-frequency doubled Yb:YAG thin-disk laser at 100 kHz repetition rate

Christian Stolzenburg, Wolfgang Schüle, Ivo Zawischa, Alexander Killi, Dirk Sutter

Proceedings Volume 7578, Solid State Lasers XIX: Technology and Devices; 75780A (2010) https://doi.org/10.1117/12.840875
Event: SPIE LASE, 2010, San Francisco, California, United States

Abstract

The thin-disk laser concept with its advantages high efficiency, excellent beam quality, and low depolarization losses provides a reliable platform for the generation of high power lasers in the infrared as well as the green spectral range. By employing intracavity-frequency conversion, we have obtained a maximum output power of 700 W at 515 nm and a repetition rate of 100 kHz from a Q-switched Yb:YAG thin-disk laser. An LBO crystal cut for critical phase matching of type I was mounted near one of the end mirrors inside the laser cavity. An optical efficiency (green output power with respect to incident pumping power) greater than 35% could be reached. By changing the low-loss duration at the Q-switch the pulse duration of the laser system can be adjusted between 200 ns and 750 ns with the longer pulse durations being generated with the highest efficiency. This feature can be used to maintain a constant pulse duration when varying the pumping power or repetition rate. The beam parameter product of 4 mmmrad (M² < 25) allows for beam delivery via an optical fiber with 100 μm core diameter. To the best of our knowledge, the average power significantly exceeds all previously published results for lasers in the visible spectrum.

Citation Download Citation

Christian Stolzenburg, Wolfgang Schüle, Ivo Zawischa, Alexander Killi, and Dirk Sutter "700W intracavity-frequency doubled Yb:YAG thin-disk laser at 100 kHz repetition rate", Proc. SPIE 7578, Solid State Lasers XIX: Technology and Devices, 75780A (17 February 2010); https://doi.org/10.1117/12.840875

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