晶体生长,极化光谱特性,以及Tm:LuVO4晶体的2.3微米激光性能
Optics express
|June 11, 2024
概括
这项研究详细介绍了第一个化瓦纳酸 (Tm:LuVO4) 晶体的连续波激光操作. Tm:LuVO4激光显示出对超短脉冲产生有前途的宽带发射.
科学领域:
- 材料科学 材料科学 材料科学
- 激光物理 激光物理
- 固态光谱学 固态光谱学
背景情况:
- 瓦纳达 (LuVO4) 由于其优良的物理和光学特性,是稀土兴奋剂的有前途的宿主材料.
- 图 (Tm3+) 离子以它们在近红外和中红外区域的辐射而闻名,使它们适合各种激光应用.
研究的目的:
- 报告Czochralski晶体的生长和表征为1.5%的Tm:LuVO4.
- 为了研究 LuVO4 主体中 Tm3+ 离子的极化光学特性和晶体场分裂.
- 为了证明Tm:LuVO4在1.4-1.5μm范围内进行的第一个连续波 (CW) 激光操作.
主要方法:
- 采用Czochralski晶体生长技术来生长Tm:LuVO4晶体.
- 低温 (12K) 极化光学光谱法用于研究吸收和辐射特性.
- 光谱分析确定了晶体场的分裂和刺激发射的截面.
- 使用光纤合激光二极管源来评估激光性能.
主要成果:
- 对于3H4 → 3H5过渡的最大刺激-发射截面被确定为2.48 × 10−20 cm2在2363 nm为π-极化.
- 观察到28纳米的广泛发射带宽,表明产生超短脉冲的潜力.
- 观察到2μm以上的Tm3+离子的phonon辅助排放.
- 该Tm:LuVO4激光器实现了瓦特级输出功率 (22792295nm) 的斜率效率为9.2%和线性极化发射.
结论:
- Tm:LuVO4晶体表现出有利的光谱特性,用于中红外区域的激光应用.
- 展示的CW激光操作证实了Tm:LuVO4作为增益介质的潜力.
- 宽带发射特征表明它适合产生超短激光脉冲.
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