Abstract

The Judd–Ofelt parameters of thulium ions in fluorophosphate glasses with different phosphate component concentrations are calculated. It is shown that the Ω_t parameters of glasses with Ba(PO₃)₂ concentrations up to 10 mol % are close to the corresponding parameters of fluoride glasses and sharply increase with increasing phosphate concentration. The spectral-luminescent parameters of glasses are analyzed within the Judd–Ofelt theory. The spontaneous transition probabilities, branching ratios (β), and radiative lifetimes (τ_rad) for different excited states of Tm³⁺ are determined. It is found that glasses with low phosphate concentrations are characterized by a high radiative lifetime of the excited ³F₄ laser level. It is shown that the glasses under study have a typical broad flat gain spectrum, which makes them promising for developing broadband amplifiers.

中文翻译：

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磷酸盐浓度对氟磷酸盐玻璃中Th离子光谱性质的影响

摘要

计算了具有不同磷酸盐成分浓度的氟磷酸盐玻璃中ul离子的Judd-Ofelt参数。结果表明，所述Ω_吨的眼镜参数用Ba（PO ₃）_2倍的浓度高达10％（摩尔）是接近的氟化物玻璃相应的参数，并用磷酸盐浓度的增加急剧增大。在Judd-Ofelt理论中分析了玻璃的光谱发光参数。确定了Tm ^3+的不同激发态的自发跃迁概率，分支比（β）和辐射寿命（_τrad）。发现低磷酸盐浓度的玻璃的特征在于被激发的高辐射寿命。³ F ₄激光水平仪。结果表明，所研究的眼镜具有典型的宽平坦增益谱，这使其有望用于开发宽带放大器。