Optical transition probability ofNd3+ions in aα−Nd3+:LaSc3(BO3)4crystal

Abstract

Optical absorption and emission intensities are investigated for ${\mathrm{Nd}}^{3+}$ ions in a $\ensuremath{\alpha}\ensuremath{-}{\mathrm{Nd}}^{3+}{:\mathrm{L}\mathrm{a}\mathrm{S}\mathrm{c}}_{3}{(\mathrm{B}\mathrm{O}}_{3}{)}_{4}$ crystal. Oscillator strengths of transition were measured from absorption spectra recorded at 300 K. Corresponding oscillator strengths for transition between the J manifold were calculated using the Judd-Ofelt theory. Phenomenological intensity parameters were derived from a least-squares-fitting procedure. The root-mean-square deviation of observed and calculated oscillator strengths was \ifmmode\pm\else\textpm\fi{}8.1%. The intensity parameters were also used to calculate the radiative transition probabilities and branching ratios from a level of ${}^{4}{\mathrm{F}}_{3/2},$ which fluoresce in a $\ensuremath{\alpha}\ensuremath{-}{\mathrm{Nd}}^{3+}{:\mathrm{L}\mathrm{a}\mathrm{S}\mathrm{c}}_{3}{(\mathrm{B}\mathrm{O}}_{3}{)}_{4}$ crystal. The stimulated emission cross sections ${\ensuremath{\sigma}}_{p}$ were calculated. It was concluded that $\ensuremath{\alpha}\ensuremath{-}{\mathrm{Nd}}^{3+}{:\mathrm{L}\mathrm{a}\mathrm{S}\mathrm{c}}_{3}{(\mathrm{B}\mathrm{O}}_{3}{)}_{4}$ crystal is a laser material with high-emission intensity.