Synthesis and photoluminescent properties of SnO-containing germanate and germanosilicate glasses

Divalent tin-containing germanate glasses have demonstrated wide photoluminescence similar to that of tin silicate glasses discovered recently. In comparison with silicate glasses, the germanate glasses are characterized by longer emission lifetimes (145 ÷ 440 µs), emission peaking at 1.59 ÷ 1.64 µm and the absence of SnO disproportionation into SnO2 and Sn during glass synthesis. The potential fabrication of optical fiber via the SnC2O4 + GeO2 powder in silica tube method was demonstrated.