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中文摘要：
用高温熔融法制备了Tm（3＋）和Ho（3＋）双掺的86GeO2-4Nb2O5-10Na2O锗铌酸盐玻璃,应用Judd-Ofelt理论,获得了Tm（3＋）的强度参量及Tm（3＋）的自发辐射跃迁几率、辐射寿命等光谱参量。根据McCumber理论,计算了玻璃中Tm（3＋）能级3H6→3F4跃迁和Ho（3＋）能级5O8→5I7跃迁和Ho（3＋）的吸收截面σa受激发射截面σa和增益光谱G（λ）。在808 nm激光二极管激发下,研究分析了Tm（3＋）敏化Ho（3＋）的2.0μm的红外发射光谱。结果表明：Ho（3＋）的共掺提高了Tm（3＋）（3F4）→Ho（3＋）（5I7）之间的能量转移效率,增强了2.0μm的红外发光。
英文摘要：
Germanate-niobate glasses with the compositions of 86GeO_2-4Nb_2O_5-10Na_2O codoped with Tm~（3＋） and Ho~（3＋） ions were fabricated by conventional melting method.According to the Judd-Ofelt theory,the J-O strength parameters of Tm~（3＋） were calculated, by which the radiative transition probabilities and radiative lifetimes were estimated.According to McCumber theory,the absorption and emission cross-sections corresponding to the ~3H_6→~3F_4 transition of Tm~（3＋） and the ~5I_8→~5I_7 transition of Ho~（3＋） have been obtained and the gain cross section spectra were also obtained,too.With 808 nm laser diode excitation,the infrared emission spectra of Tm~（3＋） sensitized Ho~（3＋） ions were studied.The results indicated that the energy transfer efficiency of Tm~（3＋）（~3F_4）→Ho~（3＋）（~5I_7） ions was enhanced and the infrared fluorescence intensity at 2.0μm was increased as Ho~（3＋） was co-doped into the glasses.
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