GeO2含量对掺铒锗碲酸盐玻璃物性和光谱特性的影响

本文研究了x GeO₂-(70-x)TeO₂-5K₂O-5Na₂O-10Nb₂O₅-10ZnO-0.2Er₂O₃(x=0,10, 25, 50, 70(摩尔百分数))玻璃的物性和光谱特性，讨论GeO₂含量对锗碲酸盐玻璃物性和光谱特性的影响.研究发现：GeO₂的加入提高了碲酸盐玻璃热稳定性， 关键词： 锗碲酸盐玻璃 玻璃热稳定性 荧光

Effects of GeO2 on the thermal stability and optical properties of Er3+-doped germanate-tellurite glasses

Germanate-tellurite glasses with the molar compositions of x GeO₂-(70-x) TeO₂-5K₂O-5Na₂O-10Nb₂O₅-10ZnO-0.2Er₂O₃ (x=0,10, 25, 50, 70) have been investigated for developing 1.5μm fiber and planar amplifiers. Effects of GeO₂ on the thermal stability and optical properties of Er³⁺-doped germanate-tellurite glasses have been discussed. It is noted that the thermal stability of the glasses are improved and the maximum phonon energy are increased by increasing GeO₂. Adding GeO₂ increases the Judd-Ofelt parameters Ω₂, Ω₆ but decreases the stimulated emission cross sections σ_e. According to the McCumber theory, the maximum peak of σ_e is 9.92×10^-21cm² at 1.53μm in germanate-tellurite glasses. The maximum FWHM of Er³⁺⁴I_13/2→⁴I_15/2 emission spectrum is 52 nm. In addition, the intensity of upconversion luminescence of the Er³⁺-doped germanate-tellurite glasses decreases rapidly with increasing GeO₂ content.