Highly Er3+ doped fluorotellurite glass for 1.5 µm broadband amplification and 2.7 µm microchip laser applications

The fluorescence properties in IR region of fluorotellurite glass with high Er3+ concentration up to 13 mol% are investigated and optimum concentration of 2.7 µm emission is 11 mol%, followed by a decrease in fluorescence intensity. The thermal characteristic parameter (ΔT = 98 °C) based on DSC curve shows a good thermal stability. The FWHM corresponding to 1.5 µm broadens as Er3+ increases and reaches a maximum of 110 nm (13 mol%) which shows...