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The results of spectroscopy of disordered Er-doped calcium-niobium- gallium garnets (CNGG: Er) are displayed.
Based on the Judd-Ofelt theory, three intensity parameters Ωt (t=2, 4, 6) for Er ions concentration from 6 at. % in these
crystals were obtained. The oscillator strength for hypersensitivity transition 4I15/2→2H11/2 and intensity parameter Ω2 of
Er3+ ions in CNGG: Er crystals are higher than corresponding values for other Er-doped garnets. These results we
explain by the presence in these crystals of optical centers Er with the environment symmetry lower than D2. Gain crosssection
for laser transition 4I13/2 → 4I15/2 of Er3+ ions was obtained using absorption and emission cross-data for transition
4I15/2 → 4I13/2 and 4I13/2 → 4I15/2 respectively.
P. A. Ryabochkina,Yu. K. Voronko,A. V. Malov,M. O. Marychev,A. A. Sobol,S. N. Ushakov, andE. V. Chuprunov
"The study of spectroscopic and luminescence properties of disordered laser crystals calcium niobium gallium garnet doped with Er3+", Proc. SPIE 6998, Solid State Lasers and Amplifiers III, 69981B (16 April 2008); https://doi.org/10.1117/12.774470
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P. A. Ryabochkina, Yu. K. Voronko, A. V. Malov, M. O. Marychev, A. A. Sobol, S. N. Ushakov, E. V. Chuprunov, "The study of spectroscopic and luminescence properties of disordered laser crystals calcium niobium gallium garnet doped with Er3+," Proc. SPIE 6998, Solid State Lasers and Amplifiers III, 69981B (16 April 2008); https://doi.org/10.1117/12.774470