Investigation on the defect structure and optical damage resistance of In:Tm:LiNbO₃crystals with different doping concentrations of In³⁺

Abstract

In:Tm:LiNbO 3 crystals were grown by the Czochralski technique with fixed concentrations of Tm 2 O 3 and differing concentrations of In 2 O 3 . Their ultraviolet-visible absorption spectra were measured in order to investigate their defect structures and their optical damage resistance was characterized by the transmission light spot distortion method. The results show that the optical damage resistance of the In:Tm:LiNbO 3 crystals improves with the doping concentration of In 2 O 3 increasing. The dependence of the optical damage resistance on the defect structure of In:Tm:LiNbO 3 crystals is discussed in detail.