Er3+掺杂的锗碲酸盐玻璃结构及光谱性能研究

采用熔融淬冷法制备了新型的Er³⁺/RE³⁺（RE³⁺=Ce³⁺，Tb³⁺）掺杂的GeO₂-TeO₂-Na₂O玻璃。测试了样品的差示扫描分析曲线、可见/近红外透过率、拉曼光谱、吸收光谱和1.53 μm发光光谱。研究发现适量的TeO₂对GeO₂的取代提高了玻璃的热稳定性，缩短了样品的吸收截止边。拉曼分析表明该系统玻璃有着宽广的红外透过范围。同时研究了980 nm激发下稀土离子（RE³⁺=Ce³⁺，Tb³⁺）的加入对Er³⁺掺杂的45GeO₂-45TeO₂-10Na₂O玻璃的光谱性能和能量传递的影响。发现随着Ce³⁺浓度增加大大地提高了1.53 μm的发光强度，CeO₂的最佳掺杂摩尔分数为0.1%，而Tb³⁺的共掺降低了1.53 μm的发光强度。可见Er³⁺/Ce³⁺掺杂的45GeO₂-45TeO₂-10Na₂O玻璃在C波段光纤放大器方面有潜在的应用前景。

Structure and Spectroscopic Properties of Er3+-doped GeO2-TeO2-Na2O Glass

A new type of Er³⁺/RE³⁺ (RE³⁺=Ce³⁺, Tb³⁺)-doped GeO₂-TeO₂-Na₂O glasses were prepared by melting quenching method. The differential scanning analysis curves, visible/near infrared transmittance, Raman spectra, absorption spectra and 1.53 μm luminescence spectra were tested. It is found that the thermal stability is enhanced and the absorption cutoff edge of the samples blue-shifted with the increase of substituted GeO₂ content for TeO₂. Raman analysis shows that the GeO₂-TeO₂-Na₂O glass has a wide range of infrared transmittance. Meanwhile, the influence of rare earth ions (RE³⁺=Ce³⁺, Tb³⁺) on the spectral properties and energy transfer of Er³⁺-doped 45GeO₂-45TeO₂-10Na₂O glass under 980 nm excitation has been studied. 1.53 μm emission intensity shows a firstly increasing and then decreasing trend, and the optimal CeO₂ mole fraction is 0.1%. While co-doping Tb³⁺ reduces the 1.53 μm emission intensity of Er³⁺. It can be seen that the Er³⁺/Ce³⁺-doped 45GeO₂-45TeO₂-10Na₂O glass might be a promising material in the field of C band fiber amplifier.