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) PbF2-10CdF(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 F-3(4) level at excitation of the H-3(4) level by using stationary spectra of luminescence at transitions H-3(4)-> F-3(4) and F-3(4)-> H-3(6) was proposed. For the samples with a high content of Tm2O3, 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 H-3(4)+H-3(6)-> F-3(4)+F-3(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 similar to 6 10(5) 1/s and W-UP << W-DA for the samples with 0.5 and 1.0 mol. % of Tm2O3. The laser related properties, the stimulated emission cross sections, gain spectra, of the glass studied, were obtained and discussed.

Automated summary

The oxyfluoride-lead-silicate-germanate glass with different compositions were prepared and their spectroscopic properties were studied. A new method for calculating pump efficiency and energy transfer processes was proposed, revealing the dominant role of quadrupole-quadrupole interaction between thulium ions. Laser related properties of the glass, including stimulated emission cross sections and gain spectra, were obtained and discussed.