Abstract

A Yb:YAG thin-disk multi-pass laser amplifier pumped at 941 nm delivers 2.3 mJ of pulse energy at 1.4 kW average output power, 950 fs pulse duration and M2 < 1.8 beam quality. Zero-phonon-line pumping at 969 nm improves M2 to below 1.4 at 1.8 mJ pulse energy and 1.1 kW average output.

© 2018 The Author(s)

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