中文摘要：

研究了Er（3＋）-Tm（3＋）共掺TeO2O-Nb2O5-Ln2O3（TKNL）碲酸盐玻璃的近红外发光光谱以及上转换光谱性质,该碲酸盐玻璃的起始析晶温度与玻璃转变温度之差△T为136℃,表明此玻璃具有良好的热稳定性,有利于拉制光纤。在808 nm半导体激光器的激发下在近红外波段观察到半高宽为185 nm的宽带近红外发光。通过对不同Tm（3＋）浓度以及不同激发波长下TKNL玻璃的近红外发光以及上转换发光的研究,探讨了Er（3＋）m（3＋）之间的能量传递机理。上述玻璃材料有望用作S和C波段光纤放大器的增益介质。

英文摘要：

Ultraboard band near infrared（NIR） luminescence of Er~（3＋）-Tm~（3＋） co-doped TeO_2-K_2O-Nb_2O_5-Ln_2O_3（TKNL） glasses was investigated.The large△T=136℃show the good thermal stability of TKNL glass,suitable for fiber drawing.A NIR broadband luminescence peak with a full width at half-maximum（FWHM） of 185 nm from 1.3μm to 1.8μm was observed under 808 nm excitation. A possible mechanism for energy transfer between Tm~（3＋） and Er~（3＋） was discussed by studying near-infrared fluorescence and up-conversion processes upon Tm~（3＋） concentrations and excitation wavelengths.The glasses may be promising as gain medium for the optical fiber amplifier in both the S and C telecommunication bands.