The LiTaO3:Tm3+ single crystals with different Tm3+ concentration were grow
n by the Czochralski method and their optical properties are presented. The
energy levels of Tm3+ multiplets split in the crystal field are determined
. The effect of the thulium concentration and of the temperature on the H-3
(4) emission lifetime is presented. The results of the Judd-Ofelt analysis
are presented and discussed. (C) 2000 Elsevier Science Ltd. All rights rese
rved.