Abstract

Continuous-wave 90-W output power is reported from 400-μm thick Yb:YAG/YAG composite structure with 10-at.% Yb:YAG core of 2×2-mm2 area. Optical phase distortions measurement gives focus shift bellow 0.05 m and shows the absence of astigmatism.

© 2004 Optical Society of America

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