Optical properties of Er3 +-doped oxyfluoride glasses

• Er3 +-singly doped and Er3 +/Yb3 +-codoped SiO2–BaF2–ZnF2 glasses were prepared.
• Judd–Ofelt analysis that indicated the glass structure changed with change of glass composition.
• The intensity of upconversion luminescence decreased with increasing ZnF2 content.

Er3 +-singly doped and Er3 +/Yb3 +-codoped 50SiO2–(50 − x)BaF2–xZnF2(SBZx) oxyfluoride glasses are prepared and the optical properties of Er3 +-singly doped glasses are investigated by using the Judd–Ofelt theory. Bright green and red upconversion luminescence of Er3 +/Yb3 +-codoped glasses is obtained under 980 nm excitation. Furthermore, factors affecting this phenomenon such as glass composition, doping concentration of Er3 + and Yb3 + ions, and pump power are discussed in details.

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