Near- and mid-infrared emissions of Dy3+ doped and Dy3+/Tm3+co-doped lead cesium iodide modified chalcohalide glasses

0.2 wt% Dy3+ doped and 0.2 wt% Dy3+/0.5 wt% Tm3+ co-doped novel GeS2-Ga2S3-PbS-CsI chalcohalide glasses were prepared and their spectroscopic properties were analyzed based on absorption (ranges from 300 to 3000 nm) and emission (ranges from 1000 to 4700 nm) measurements. Judd-Ofelt analyses were performed to estimate radiative transition parameters for the excited levels. Compositional dependences of near- and mid-infrared luminescences (especially the 1330, 2930 and 4320 nm) excited at 808 nm were investigated and discussed. These novel chalcohalide glasses may have potential uses in 1.3 μm fiber-amplifiers and 2.9 or 4.3 μm mid-infrared laser devices.