Spectral-luminescence properties of oxyfluoride lead-silicate-germanate glass doped with Tm3+ ions

The oxyfluoride-lead-silicate-germanate glass with composition of 30SiO 2 –10GeO 2 –xPbO–(50-x)PbF 2 –10CdF 2 –yTm 2 O 3 , x = 5, 25, 45, y = 0.01, 0.1, 0.5, 1.0 (mol. %) were prepared by melt-quenching technique and their spectroscopic properties, including parameters calculated by the JO method, were studied. A new approach for calculation of the pump efficiency of the 3 F 4 level at excitation of the 3 H 4 level by using stationary spectra of luminescence at transitions 3 H 4 → 3 F 4 and 3 F 4 → 3 H 6 was proposed. For the samples with a high content of Tm 2 O 3 , the efficiency reaches the value of 1.8. It was established that the quadrupole-quadrupole interaction between thulium ions dominates in the D-A energy transfer due to the cross-relaxation 3 H 4 + 3 H 6 → 3 F 4 + 3 F 4 . On the base of the rate equations, a new fitting procedure was proposed for obtaining the probabilities of donor-acceptor, W DA , and up-conversion, W UP , energy transfer. It was obtained that W DA ~6 10 5 1/s and W UP « W DA for the samples with 0.5 and 1.0 mol. % of Tm 2 O 3 . The laser related properties, the stimulated emission cross-sections, gain spectra, of the glass studied, were obtained and discussed. • Spectral-luminescence properties of oxyfluoride lead-silicate-germanate glass doped with Tm 3+ ions were studied. • The energy transfer between Tm 3+ ions in the glass matrix through the cross-relaxation is discussed. • A new approach for the calculation of the pump efficiency of the 3 F 4 level by spectra of luminescence was proposed. • A new fitting procedure was proposed for obtaining the probabilities of donor-acceptor and up-conversion energy transfer. • Laser related spectroscopic properties of oxyfluoride lead-silicate-germanate glass doped with Tm 3+ were studied.