5-W repetitively Q-switched Er:LuAG laser resonantly pumped by an erbium fiber laser

Abstract

We report a high-average-power, near-diffraction-limited Er:LuAG laser generating 5 W of power at $1.648 \mathit{\mu }\mathrm{m}$ in either cw or repetitively $Q$-switched operation. When the laser is $Q$ switched at 9 kHz, we measure $0.52 \mathrm{mJ}/\mathrm{pulse}$. The laser is end pumped by a 20-W erbium fiber laser and achieves $>30\%$ optical conversion efficiency and $>40\%$ incident slope efficiency. This is, to our knowledge, the highest performance (average power and conversion efficiency) obtained from a bulk solid-state erbium laser.

© 2003 Optical Society of America

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