Controlling of the charge states in laser crystals

Abstract

In this paper changes in active and lattice ions valence were investigated in some laser materials such as: Cr:Y3Al5O12, Cr:LiNbO3 and Cr:Li2B4O7 glass, Ti:Al2O3 and Ti:LaGaO3, Co:SrLaGa3O7 and Co:Li2B4$?O(subscript 7 glass, Eu, Dy:Li2B4O7 glass, Ho:LiTaO3, Nd:YVO4 , Nd:SrLaGa3O7 and Pr:SrLaGa3O7 after annealing in oxidization and reducing atmospheres, ionizing with gamma, electrons and protons. After (gamma) -irradiation 446 nm emission is observed for Ti:LaGaO3 single crystal due to 2E yields 2T2 transition of Ti3+.