Research Program on New Perovskite Laser Host Materials of the A(B Sub 0.5b Sub 0.5) 03type Having Cubic Centrosymmetric Lattice Sites

摘要

Research is directed toward obtaining laser host materials with structures having cubic centrosymmetric sites in which trivalent laser activating ions can be substituted. Powders of perovskite-type compounds having the general formula Ba(B(3+) sub 0.5Ta sub 0.5) 03 with B(3+) = rare earth Y(3+), Sc(3+) and In(3+) ions were prepared and their structures analyzed by means of X-ray diffraction. The studies showed that the most suitable host materials for this program were Ba(Y sub 0.5Ta sub 0.5)03, Ba(Lu sub 0.5Ta sub 0.5)03, Ba(Sc sub 0.5Ta sub 0.5)03 and Ba(In sub 0.5a sub 0.5)03 because they had cubic unit cells and contained ions with appropriate electronic configurations. These compounds have been prepared with Cr(3+) and Nd(3+) doping, and the fluorescence spectra of the Nd(3+) doped phases have been recorded and analyzed. Studies involving flux growth of crystals also have been made during this period.