Abstract
Lutetium Aluminum Garnet (LuAG) is a garnet isostructure similar to Yttrium Aluminum Garnet (YAG). High quality Ho3+ doped YAG and LuAG transparent polycrystalline ceramics were fabricated successfully by a reactive sintering method under vacuum. The microstructures, absorption spectrum, fluorescence spectrum and the laser performances of Ho:YAG and Ho:LuAG ceramics were systematically investigated. The in-line transmittances of Ho:YAG ceramic in the visible and infrared region are higher than 82% and 84%. The absorption coefficient of 1.0 at.% Ho:LuAG is 0.88 cm−1 at 1906 nm and its absorption cross section is 0.62 × 10−20 cm2.
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