Abstract

Inversion dependent losses have been observed in Yb:Lu<sup>2</sup>O<sup>3</sup>and Yb:YAG thin-disk lasers leading to significant heating. A degradation of laser performance over time is found for Yb:Lu<sup>2</sup>O<sup>3</sup>. The different behaviour of the materials is discussed.

© 2009 Optical Society of America

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