Influence of Tm3+ ions on the amplification of Ho3+:5I7→5I8 transition in fluori

In this work, we investigate a new type of fluoride glasses modified by Al(PO3)3 with various Tm3+/Ho3+ doping concentrations. The introduced PO3? plays an effective role in improving the glass-forming ability and thermal stability. Besides, 1.47, 1.8, and 2.0 μm emissions originating from Tm3+ and