稀土掺杂激光玻璃光纤是光纤激光器的核心增益介质，其中稀土离子掺杂浓度是决定激光玻璃增益特性的重要参数，如何快速有效地确定最佳掺杂浓度是稀土掺杂激光玻璃光纤的关键科学问题之一。本文以Er³⁺掺杂锗酸盐激光玻璃为例，利用Er³⁺：⁴I_13/2→⁴I_15/2跃迁的自发辐射跃迁寿命和实测寿命，预测了锗酸盐激光玻璃的猝灭浓度。研究表明，在该玻璃体系中，理论预测与实际值的最大绝对误差小于0.4%。对比唯象模型和有限扩散模型分别拟合多个样品发光强度和实测寿命确定猝灭浓度的方法，本文提出的方法仅需通过少量样品的测试参数即可确定激光玻璃猝灭浓度，简单快捷且计算误差小，对高增益激光玻璃与光纤研究具有指导意义。

Bismuth (Bi)-doped near-infared (NIR) glass that can cover the entire optical communication window (850, 1310, and 1550 nm) has become the subject of extensive research for developing photonic devices, particularly, tunable fiber lasers and ultrabroadband optical amplifiers. However, the realization of highly efficient NIR luminescence from Bi-doped glass is still full of challenges. Notably, due to the co-existence of multiple Bi NIR centers in the glass, the origin of newly generated Bi NIR emission peaks at ∼930 and ∼1520 nm is still controversial. Here, we report a new Bi-doped nitridated germanate glass with tunable ultrabroadband NIR emission (850–1700 nm) and high external quantum efficiency (EQE) of ∼50%. A series of studies, including spectral analysis, nuclear magnetic resonance (NMR), and others, provide powerful evidence for the mechanism of luminescence enhancement and tunability, and make reasonable inferences about the origin of the new emission bands at ∼930 and ∼1520 nm. We believe that the results discussed above would enrich our understanding about multiple Bi NIR emission behaviors and contribute to the design and fabrication of highly efficient Bi-doped ultrabroadband wavelength-tunable optical glass fiber amplifiers and lasers in the future.

通过传统的熔融淬火技术以及后续热处理法制备了Tm³⁺/Yb³⁺共掺含LaF₃纳米晶锗酸盐微晶玻璃。通过DTA和XRD研究其热性质和LaF₃纳米晶的可控析出。通过透过光谱和上转换发光光谱研究了玻璃的光学性能。利用荧光强度比（FIR）技术研究了微晶玻璃样品在980 nm激光激发下的上转换发光光谱与温度的依赖关系。研究发现，该微晶玻璃样品在313~573 K温度范围内的最大绝对灵敏度S_a和最大相对灵敏度S_r分别为2.6×10^-4 K^-1（573 K）和2.3×10^-2 K^-1（313 K）。结果表明，Tm³⁺/Yb³⁺共掺含LaF₃纳米晶锗酸盐微晶玻璃在温度传感领域具有潜在的应用前景。