Abstract
High optical quality transparent Yb:YAG laser ceramics have been successfully fabricated by a vacuum reactive sintering method. Commercial Al2O3 powder and co-precipitated Y2O3 and Yb2O3 powders were used as the raw materials. In-line transmittances at 1300nm and 400nm were measured to be 83.6% and 81.8% respectively for a 3mm thick mirror polished Yb:YAG ceramics sample. Continuous wave (CW) lasing at the wavelength of 1030nm was achieved when pumped by a 940nm fiber coupled laser diode. A slope efficiency as high as 62.7% was obtained.
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