Abstract

Crystals of the self-doubling KGd(PO<sub>3</sub>)<sub>4</sub> were grown with Yb-doping as high as 3.2×10<sup>20</sup> at/cm<sup>3</sup>. They were spectroscopically characterized and laser generation in the 1 μm range was achieved with a slope efficiency exceeding 55%.

© 2007 Optical Society of America

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