In doping effect on optical properties in Zn:In:Fe:LiNbO₃ crystals

Abstract

A series of Zn:In:Fe:LiNbO 3 crystals were prepared by Czochralski method. The crystal composition and defect structure were analyzed by ICP-OE/MS, UV-vis and IR spectroscopy. The results show that with increasing In 3+ doping concentration in melt, the segregation coefficients of both Zn and In ions decrease. The optical damage resistance of Zn:In:Fe:LiNbO 3 crystals was studied by the transmitted beam pattern distortion method. It is found that the optical damage resistance of Zn:In(3mol%):Fe LiNbO 3 crystals is two orders of magnitude higher than that of Zn:Fe:LiNbO 3 .

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

“…In LiNbO 3 crystal, Nb Li 4+ is the most probable electron acceptor in a Li-deficient LiNbO 3 host. Thus a reduced Nb Li 4+ concentration would lead to an increase of photoconductivity 18 . From the UV-Vis spectroscopic results, we know that in In:Tm:LiNbO 3 crystals, with the In 3+ doping concentrations increase, the intrinsic defect (Nb Li 4+ ) concentrations reduce.…”