“…The 2.0 at.% Tm 3+ , 0.2 at.% Pr 3+ co-doped LuAG and 2.0 at.% Tm 3+ single doped LuAG single crystals were grown by the μ-PD method [15,16]. The Tm 2 O 3 , Lu 2 O 3 , Al 2 O 3 and Pr 6 O 11 powders with purity of 99.999% were prepared as raw materials.…”