Tm:YAG
Tm：YAG在0.82μm波长范围内的3H4–3H6跃迁上运行。它可以用波长范围为0.78 – 0.8μm的高效二极管激光器泵浦。该过渡具有小的量子缺陷，可实现低散热。为了获得良好的能量存储，激发态寿命可以很长，大约为毫秒。它还具有足够的增益带宽，可根据主体材料和工作温度来支持亚ps长的脉冲。与单晶材料相比，透明陶瓷材料结合了单晶和玻璃的优点。通过固态反应和真空烧结来制造透明陶瓷材料。因此，它们不仅具有与单晶一样优良的光学和热性能，而且还具有大尺寸、高浓度的特点。此外，它们还具有其他优势，例如制造周期短，成本较低和多功能样品。
材料规格
| Tm浓度公差（atm％） | Tm:0.5~5at% |
| 取向 | [111]，<5º |
| 平行性 | ≤10″ |
| 垂直性 | ≤5′ |
| 表面质量 | 10-5 (MIL-O-13830A) |
| 波前失真 | ≤ 0.125λ/25 mm @632.8nm |
| 表面平整度 | λ/8@632nm |
| 通光孔径 | >95% |
| 倒角 | 0.15±0.05mm |
| 尺寸 | D: 2~10mm，L: 3~150mm |
| 涂层 | AR: ≤0.25% @2μm |
物理和化学特性
光学和光谱性质
| 激光跃迁 | 3F4→3H6 |
| 激光波长 | 1.87~2.16μm |
| 折射率的温度依赖性 | 7.3 10-6/K |
| 吸收截面 | 7.5×10-21cm2 |
| 二极管泵浦带 | 785nm, 680nm |
| 发射截面@ 2013nm | 2.9×10-20 cm2 |
| 荧光寿命 | 11ms |
| 折射率@ 632nm | 1.83 |
参考文献
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