Abstract
We report results for high quality transparent ceramic window materials (spinel and β-SiC) and high power solid state laser materials (Yb:Y<sub>2</sub>O<sub>3</sub> and Yb:Lu<sub>2</sub>O<sub>3</sub>). Spinel ceramic demonstrates a record low absorption loss of 6 ppm/cm at 1.06 μm. We also report optical transparency from a β-SiC ceramic fabricated by the Spark Plasma Sintering technique. Capability of fabricating various shape and size of spinel ceramics is also demonstrated. We report lasing in hot pressed Yb<sup>3+</sup>:Y<sub>2</sub>O<sub>3</sub> and Yb<sup>3+</sup>:Lu<sub>2</sub>O<sub>3</sub> ceramic made from co-precipitated powder. Highest output power and efficiency from heavily doped Yb<sup>3+</sup> doped Lu<sub>2</sub>O<sub>3</sub> ceramic are reported.
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