The near-infrared (NIR) emission and energy transfer (ET) of Pr³⁺–Er³⁺–Yb³⁺ tri-doped in TeO₂–Nb₂O₅–BaO–La₂O₃ niobate tellurite glasses under the excitation of a 980 nm laser diode (LD) were investigated. A broadband flat NIR emission of Pr³⁺–Er³⁺–Yb³⁺ tri-doped was observed within the range of 1250 to 1650 nm with a full-width at half-maximum (FWHM) of about 300 nm which covered the whole O-, E-, S-, C- and (C+L)- bands. The role of Yb³⁺ for enhancing the intensity of NIR emissions has also been examined. Remarkably, the analysis results on the DTA curve exhibited the good thermal stability of TeO₂–Nb₂O₅–BaO–La₂O₃ niobate tellurite glasses in this study with the average value of ΔT = 196°C. The G_Pr(λ), G_Er(λ) gain coefficient spectra of Pr³⁺ and Er³⁺, respectively in the TNBL-0P0.1E0Y (Er³⁺-single-doping) and the TNBL-0.8P0E0Y (Pr³⁺-single-doping), are determined. Besides, the mechanism of ET processes between Pr³⁺, Er³⁺, and Yb³⁺ was proposed and discussed.

近红外（NIR）辐射和能量转移（ET）镨³⁺ -Er ³⁺ -Yb ³⁺三掺杂的TeO ₂ -Nb ₂ ö ₅ -BaO-的La ₂ ö ₃铌酸碲酸盐玻璃的激发下研究了980 nm激光二极管（LD）的尺寸。的宽带平坦NIR发射镨³⁺ -Er ³⁺ -Yb ³⁺ 1250的范围内，观察到1650nm的三掺杂有全宽，其覆盖了整个的约300nm的半最大值（FWHM） O，E，S，C和（C + L）-频段。Yb ³⁺的作用还研究了增强NIR发射强度的方法。值得注意的是，在本研究中，DTA曲线的分析结果显示了TeO ₂ -Nb ₂ O ₅ -BaO-La ₂ O ₃铌酸碲玻璃的良好热稳定性，其平均值为ΔT= 196°C。对于g_镨（λ），G_尔（λ）Pr中增益系数频谱³⁺和Er ³⁺，分别在TNBL-0P0.1E0Y（二³⁺ -单掺杂）和TNBL-0.8P0E0Y（镨^{3 +} -单掺杂）。此外，Pr ³⁺，Er ³⁺和Yb之间的ET过程机理提出并讨论了³⁺。