Er^(3+)掺杂的锗碲酸盐玻璃结构及光谱性能研究

Structure and Spectroscopic Properties of Er^(3+)-doped GeO_2-TeO_2-Na_2O Glass

采用熔融淬冷法制备了新型的Er^(3+)/RE^(3+)(RE^(3+)=Ce^(3+),Tb^(3+))掺杂的Ge O_2-Te O_2-Na_2O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1.53μm发光光谱。研究发现适量的Te O_2对Ge O_2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(RE^(3+)=Ce^(3+),Tb^(3+))的加入对Er^(3+)掺杂的45GeO_2-45TeO_2-10Na_2O玻璃的光谱性能和能量传递的影响。发现随着Ce^(3+)浓度增加大大地提高了1.53μm的发光强度,Ce O_2的最佳掺杂摩尔分数为0.1%,而Tb^(3+)的共掺降低了1.53μm的发光强度。可见Er^(3+)/Ce^(3+)掺杂的45GeO_2-45TeO_2-10Na_2O玻璃在C波段光纤放大器方面有潜在的应用前景。

A new type of Er^3+/RE^3+(RE^3+=Ce^3+,Tb^3+)-doped GeO 2-TeO 2-Na 2O glasses were prepared by melting quenching method.The differential scanning analysis curves,visible/near infrared transmittance,Raman spectra,absorption spectra and 1.53μm 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 GeO 2 content for TeO 2.Raman analysis shows that the GeO 2-TeO 2-Na 2O glass has a wide range of infrared transmittance.Meanwhile,the influence of rare earth ions(RE^3+=Ce^3+,Tb^3+)on the spectral properties and energy transfer of Er^3+-doped 45GeO 2-45TeO 2-10Na 2O glass under 980 nm excitation has been studied.1.53μm emission intensity shows a firstly increasing and then decreasing trend,and the optimal CeO 2 mole fraction is 0.1%.While co-doping Tb^3+reduces the 1.53μm emission intensity of Er^3+.It can be seen that the Er^3+/Ce^3+-doped 45GeO 2-45TeO 2-10Na 2O glass might be a promising material in the field of C band fiber amplifier.