Er/Yb共掺硅酸盐玻璃的光致发光

采用固相反应方法，制备了Er³⁺离子浓度为0.5 at.%，Yb掺杂浓度范围为0.0— 6.0 at.%的Er/Yb共掺激光玻璃，并对激光玻璃的吸收光谱和光致荧光光谱进行了分析.研究 结果显示，Yb³⁺掺杂对Er³⁺在980 nm附近的吸收起到了非常显著的 增强作用.在 980 nm的激光抽运下，激光玻璃在1530 nm处的光致发光强度随着Yb离子浓度 的增加而先增大后减小， 当Yb³⁺离子浓度为Er³⁺离子浓度6倍时光 致发光强度达到最大值.同时还发现了Yb³⁺对Er³⁺的光致荧光光谱 的展宽作用，并讨论了荧光光谱的展宽机理. 关键词： Er/Yb共掺玻璃 光致发光 吸收光谱

Absorption and photoluminescence properties Er/Yb co-doped soda-silicate glasses

Er/Yb co-doped soda-silicate glasses with 0.5 at.% Er and various concentrations Yb were fabricated. The absorption and the photoluminescence (PL) spectra were measured and analyzed. The PL intensity of the Er/Yb co-doped soda-silicate glasses is enhanced 4 times approximately, and the optimum Yb concentration for the PL intensity at 1536 nm is 3.0 at.%. The PL spectrum becomes broader with the in crease of Yb concentration, up to a FWHM of 80 nm at 6.0 at.% Yb. The relation b etween absorption and PL spectra, together with the mechanism of PL broadening, has been addressed.