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A series of Yb:Nd:LiNbO_3 crystals tridoped with various concentrations of Zr~(4+)(1 mol.%, 2 mol.% and 4 mol.%) were grown by the Czochralski technique from the congruent melt. The X-ray powder diffraction, UV-Vis-NIR absorption spectra and IR transmittance spectra were measured to analyze the crystal composition and defect structure. The Zr~(4+), Yb~(3+) and Nd~(3+) ions in LiNbO_3 crystal had two effects: volume compensation effect and ion valence state compensation effect. The Zr O2 doping threshold concentration was nearly 2.0 mol.%. The fluorescence emissions of Nd~(3+) ions and Yb~(3+) ions were observed under 808 nm excitation. The intensity of fluorescence emissions enhanced with the increasing of the Zr~(4+) doping concentrations. The Zr:Yb:Nd:LiNbO_3 crystals with 4 mol.% doping concentration of Zr~(4+) ion revealed strong emission around 1 μm, which is of great significance for laser materials.
A series of Yb: Nd: LiNbO 3 crystals tridoped with various concentrations of Zr ~ (4 +) (1 mol.%, 2 mol.% And 4 mol.%) Were grown by the Czochralski technique from the congruent melt. The X- ray powder diffraction, UV-Vis-NIR absorption spectra and IR transmittance spectra were measured to analyze the crystal composition and defect structure. The Zr ~ (4+), Yb ~ (3+) and Nd ~ (3+) ions in LiNbO_3 The fluorescence emission of Nd ~ (3 +) ions and Yb ~ (3 +) ions were observed under 808 nm excitation. The intensity of fluorescence emissions enhanced with the increasing of the Zr 4+ doping concentrations. The Zr: Yb: Nd: LiNbO 3 crystals with 4 mol.% Doping concentration of Zr ~ (4+) ion strong strong emission around 1 μm, which is of great significance for laser materials.