Abstract
In this work, Er3 + and Tm3 + -dopedLiLa9(SiO4)6O2 crystals have beengrown from an Li2MoO4 flux in the 1360–940 °C temperature range. Optical absorption spectra have been measured to obtainthe experimental oscillator strengths of the transitions from the ground state tothe excited levels. Judd–Ofelt calculations have been performed to estimate theΩ2,Ω4 andΩ6 intensity parameters. The dynamics of selectedEr3 + andTm3 + manifolds have been investigated under selective pulsed excitation in order to determinethe energy gap law by comparing the observed decay rates with the Judd–Ofelt predictions.
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