We report on the characterization and analysis of the spectroscopic properties of an Er3+-doped Ba(Zr,Mg,Ta)O3 (Er:BZMT) transparent ceramic showing a disordered perovskite structure. The Judd-Ofelt model was applied to estimate the radiative lifetimes and branching ratios of the 1.5 and 3 µm emission transitions, which are potential for laser operation. The experimental fluorescence lifetimes of the transitions of 4I13/2 → 4I15/2 and 4I11/2 → 4I13/2 were recorded to calculate the radiative quantum efficiencies. According to the analysis, significant non-radiative relaxation processes from the 4I11/2 multiplets should exist in the Er:BZMT system, which makes this material more suitable for laser operation at 1.6 µm. Finally, the gain cross-section for the potential 1.6 µm laser emission was calculated, showing a broad tuning range from less than 1.6 µm to around 1.7 µm. This result also indicates that femtosecond level laser pulses are possible using Er:BZMT as laser gain medium.

中文翻译：

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用于激光发射的 Er:BZMT 陶瓷的光谱特性

我们报告了 Er3+ 掺杂 Ba(Zr,Mg,Ta)O3 (Er:BZMT) 透明陶瓷的光谱特性的表征和分析，显示出无序的钙钛矿结构。应用 Judd-Ofelt 模型来估计 1.5 和 3 µm 发射跃迁的辐射寿命和分支比，这是激光操作的潜力。记录 4I13/2 → 4I15/2 和 4I11/2 → 4I13/2 跃迁的实验荧光寿命以计算辐射量子效率。根据分析，Er:BZMT 系统中应该存在来自 4I11/2 多重峰的显着非辐射弛豫过程，这使得该材料更适合 1.6 µm 的激光操作。最后，计算了潜在 1.6 µm 激光发射的增益截面，显示出小于 1 的宽调谐范围。6 µm 至 1.7 µm 左右。该结果还表明，使用 Er:BZMT 作为激光增益介质，飞秒级激光脉冲是可能的。