RARE EARTH DOPED Lu2O3 POLYCRYSTALLINE CERAMIC LASER GAIN MEDIUM

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A method for making a rare earth doped polycrystalline ceramic laser gain medium by hot pressing a rare earth doped polycrystalline powder where the doping concentration is greater than 2% and up to 10% and where the grain size of the final ceramic is greater than 2 μm. The polycrystalline powder can be Lu2O3, Y2O3, or Sc2O3, and the rare earth dopant can be Yb3+, Er3+, Tm3+, or Ho3+. Also disclosed is the related rare earth doped polycrystalline ceramic laser gain medium prepared by this method.