Abstract
The Nd:YAG ceramics of 1% and 2% Nd dopant were produced by a solid‐state reaction of high‐purity (4N) nanometric oxides powders, i.e., Al2O3, Y2O3, and Nd2O3. Mean grain sizes of about 20 μm and grain boundaries less than 5 nm of Nd:YAG ceramic samples were evaluated in SEM and TEM measurements. Two types of active elements: rods and slabs were fabricated and characterized in several diode pumping schemes. In the best case, 3.7 W of output power, M2<1.4 were demonstrated for uncoated ceramics 2% Nd:YAG rod of o/4×3 mm size in preliminary experiments. In case of Nd:YAG ceramic slab above 12 W was demonstrated.
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