The Growth Defect and the Spectral Characteristics of the Yb: ZW Single Crystal

These ZnWO₄:Yb³⁺ crystals with different doping level (0.05%, 0.5%, 1%) have been made grown by the Czochalski method. According to the X-ray powder diffraction pattern, the lattice parameter is determined. The way of Yb³⁺ ions entering the crystal lattice as a substitute for Zn²⁺ is confirmed by the density experiment The component supercold and dislocation are observed. The type of the dislocation and the dislocation juncture with different doping level are studied. The dislocation density increases with the doping level. The reasonable technical parameter must be adopted in order to decrease the density of the dislocation and improve the quality of the crystal. The absorption spectra of the crystal are studied and the laser performance is discussed.