Optical properties of Ho3+ doped oxyfluoroborate glass

Ho3+ doped oxyfluoroborate glasses have been prepared with different concentration of holmium. The absorption and the fluorescence spectra have been recorded and used to determine various optical parameters such as oscillator strength, Judd-Ofelt intensity parameters, electric dipole line strengths, transition probability, branching ratio, stimulated emission cross section etc. Lifetime of the 5S2 level has been measured and found to decrease with an increase of the rare earth concentration. Non-radiative transition probability and quantum efficiency of the radiative transitions have also been calculated.