Concentration dependence of Dy3+:1.3 μm luminescence in Ge–Ga–Sb–Se glasses

Abstract The Ge 25 Ga 5 Sb 5 Se 65 glasses, doped with 0.01, 0.05, 0.1, 0.2, and 0.5 mol% of Dy 3+ ions are prepared and the concentration dependence of Dy 3+ :1.3 μm luminescence is investigated. Remarkable energy migration between Dy 3+ ions occurs as its concentration is more than 0.05 mol%. With further increasing amount of Dy 3+ ions, the decay time of the 1.3 μm fluorescence decreases rapidly. All the decays are simple exponential and possible regimes of the donor decay are discussed.