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从2.8μm的LMA化纤维中几乎有衍射限制的皮秒脉冲放大2.8μm
Optics express
|February 1, 2024
概括
研究人员使用大模式区域 (LMA) Er:ZBLAN 纤维放大器产生了高质量的皮秒脉冲. 这种2.8微米系统为先进的生物材料加工提供高能脉冲.
科学领域:
- 激光物理 激光物理
- 光学工程是指光学工程.
- 材料科学 材料科学 材料科学
背景情况:
- 纤维放大器对于产生高能激光脉冲至关重要.
- 从大模式区域纤维获得高光束质量是具有挑战性的.
- 中红外波长 (2.8微米) 对于生物材料加工等特定应用非常重要.
研究的目的:
- 为了证明从大模式区域 (LMA) 化纤维放大器产生的几乎衍射有限的皮秒脉冲的产生.
- 描述LMA Er:ZBLAN光纤放大器在2.8微米的性能.
- 评估该系统在高精度生物材料加工方面的潜力.
主要方法:
- 在2.8微米时播种一种模式锁定纤维振荡器.
- 使用一个50μm LMA Er:ZBLAN光纤放大器.
- 使用基本模式激发技术.
- 使用M2值测量光束质量.
主要成果:
- 在5kHz的重复频率下生成一个16μJ的皮秒脉冲,持续时间为70ps.
- 实现了接近偏光限制的光束质量,M2值为1.25 (x轴) 和1.27 (y轴).
- 在2.8μm时证明了LMA光纤放大器的成功运行.
结论:
- 开发的LMA Er:ZBLAN光纤放大器系统成功地产生了2.8微米的高能,几乎衍射限制的皮秒脉冲.
- 该系统的高光束质量和能量输出表明了对高精度生物材料加工的巨大潜力.
- 这项工作在中红外光谱中推进了基于光纤的激光系统的能力.
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