Abstract
Ho 3+ doped glasses with various compositions xGeO 2-(80- x)TeO 2-9.5ZnF 2-10NaF-0.5Ho 2O 3 ( x=0, 10, 20, 30, 40, 50, 60, 70 and 80) were prepared by a melt-quenching technique. The composition-dependent optical transition properties of Ho 3+ were investigated in the framework of Judd-Ofelt theory. The emission cross sections for 5I 7→ 5I 8 transition of Ho 3+ in these glasses were calculated according to McCumber theory, and their compositional dependence was discussed. A simple method was proposed in calculating the emission cross sections of 5I 7→ 5I 8 transition, and the calculation results were compared with those derived from McCumber theory. Finally, the optical gain coefficient spectra for 5I 7→ 5I 8 transition were also analyzed.
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