Stability, glass forming ability and spectral properties of Ho/Yb co-doped TeO2-WO3-ZnX(XÂ =Â O/F2/Cl2) system

The Ho/Yb co-doped TeO2-WO3-ZnX(X = O/F2/Cl2) glasses were prepared by using the convention melt-quenching method. The physical and chemistry stabilities were studied by DTA (differential thermal analysis) and acid corrosion method, and the crystallization kinetics of the glasses were also studied. The luminescent properties of the glasses were studied with 980 nm laser excitation, which indicated that the higher the ZnF2 content the stronger the green emission. The luminescence bands intensity increased obviously when the ZnF2 concentration increased from 5 to 15 mol%, however the glass was easily induced to crystallization when the ZnF2 concentration exceeds 10 mol%. The Introduction of ZnCl2 modifier may benefit the improvement of the thermal stability of the glasses. The F/Cl co-doped tellurite oxy-halide glasses hold the advantages of both good glass forming ability and high luminescence intensity, indicating the potential application for fiber-optics.