Spectroscopic properties of Er:BZMT ceramics for laser emission
Spectroscopic properties of Er:BZMT ceramics for laser emission
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DOI：
10.1364/ome.408858
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发表时间：
2020-12
影响因子：
2.8
通讯作者：
W. Yao;Hengjun Chen;H. Uehara;R. Yasuhara
中科院分区：
文献类型：
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作者：
W. Yao;Hengjun Chen;H. Uehara;R. Yasuhara
我们报告的Er 3+掺杂的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，这些跃迁具有激光操作的潜力。记录了4 I13/2 → 4 I15/2和4 I11/2 → 4 I13/2跃迁的荧光寿命，计算了辐射量子效率。根据分析，Er：BZMT系统中应该存在来自4 I11/2多重态的显著非辐射弛豫过程，这使得该材料更适合于1.6 μm的激光操作。最后，计算了潜在的1.6 μm激光发射的增益截面，显示出从小于1.6 μm到1.7 μm左右的宽调谐范围。这一结果也表明，使用Er：BZMT作为激光增益介质的飞秒激光脉冲是可能的。
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.