Spectroscopic and laser properties of BeLaAl_(11)_(19) single crystals doped with Cr~(3+), Ti~(3+) and Nd~(3+) ions

摘要

The new laser crystals BeLaAl_(11)O_(19) doped with Cr~(3+), Ti~(3+) and Nd~(3+) ions were grown by the Czochralski technique. The absorption and fluorescence spectra of impurity ions are reported and the temperature dependence of the fluorescence lifetime are described. The laser properties these ions were investigated. The laser action has been achieved on ~4F_(2/3) -~4I_(11/2) (1052 nm) transition of Nd~(3+)-ions under selective laser pumping. The physical properties of BeLaAl_(11)O_(19) crystal were studied: the values of all independent component of elastic constant tensor were determined. On they base a number dynamic parameters of crystals, such as Young's modulus, the shear modulus, the volume elasticity modulus and Poisson's factor, Debye temperature and specific heat capacity were calculated. The investigation show that the BeLaAl_(11)O_(19) is a promising host for a creature the new solid state laser media.