Growth of Zr co-doped Tm:LiNbO3 single crystal for improvement of photoluminescence property in blue wavelength range

Abstract

Tm2O3 0.5 and 1mol% doped LiNbO3 single crystals with near-stoichiometric composition were grown by the micro-pulling-down method. Also, ZrO2 2, 3 and 4mol% were co-doped in the Tm doped LiNbO3 single crystals to improve optical damage resistance. The grown crystals were free of crack and the structural properties were confirmed by the powder X-ray diffraction (XRD) patterns. Electron probe micro analysis (EPMA) showed that dopants were homogeneously incorporated into the LiNbO3 single crystals. And the photoluminescence (PL) properties were measured in the visible wavelength range. In the result of PL analysis, strong emission was observed around 470nm in blue wavelength region and the PL properties were increased remarkably by the addition of ZrO2.