Yb: The Ypxv <sub> 1 </ Sub>-xo <sub> 4 </ Sub> Laser Crystal Growth, Structure And Performance

This thesis reports the growth, spectral properties of YPxV1-xO4 and YbYP_xV_1-xO₄ crystals.The polycrystalline material was synthesized by the liquid-phase reaction method and the single crystals were grown by the Czochralski method. The segregation coefficients of the dopant ions in YbYP_xV_1-xO₄ crystal were calculated in terms of the component analyses by ICP. The positions of the X-ray power diffraction peaks are quite consistent with the JCPDS date of YVO4, from which the lattice structure parameters of the crystals were calculated. The laser damage threshold of the YbYP_xV_1-xO₄determined by Nd:YAG laser, which showed a decreasing tendency with the increase of the dopant concentration. The absorption spectra and the fluorescence spectra of YbYP_xV_1-xO₄ crystal were measured at room temperature, from which the Stark levels of the Yb3+ ion were concluded. The spectra parameters of these crystals can be calculated by the F-L formula, which show that the crystals are applicable for the tunable laser and femtosecond laser because of their large emission broadband (FWHM～50nm). A conclucion can be drawed by study the effection of P ,that is ,lower P dopant is good to improve the properties of YbYP_xV_1-xO₄ crystal.