半千瓦功率放大器的半千瓦功率放大器的Yb合的形双层纤维与偏振维护
Optics express
|November 22, 2024
概括
这项研究通过直接将短脉冲放大到数百瓦的速度,使用合物合的缩双层纤维 (T-DCFs) 来推进光纤激光技术. 该系统保持高极化和光束质量,为高功率的皮秒激光器提供一个紧的解决方案.
科学领域:
- 激光物理和光子学 激光物理和光子学
- 光纤光学是指光纤的使用.
- 材料科学 材料科学 材料科学
背景情况:
- 在单纤维激光系统中直接放大短脉冲面临着热模式不稳定性和非线性效应等挑战.
- 对于超大模式区域 (ULMA) 纤维来说,在高功率水平下保持线性偏振特别困难.
研究的目的:
- 为了证明在单阶段光纤激光系统中直接放大狭窄线宽短脉冲到数百瓦的显著进步.
- 为了研究两种类型的Ytterbium-doped渐变的双层纤维 (T-DCFs) 的性能,用于高功率的短脉冲放大.
- 在最大输出功率下保持高度的线性极化.
主要方法:
- 实验研究了两种被添加的T-DCF:具有高双折射的PANDA (PT-DCF) 和具有超低双折射的旋转 (sT-DCF).
- 采用了放大器的独特几何架构,以实现紧而高效的皮秒光纤激光系统设计.
- 在单个阶段中放大50 ps脉冲 (65 mW平均功率,20 MHz重复率).
主要成果:
- 从最初的65mW获得的平均输出功率为457W (PT-DCF) 和573W (sT-DCF).
- 已证明高斜率效率超过75%和接近偏光限制的光束质量 (M2 < 1.4).
- 保持高线性极化:在最大功率级别下,约90% (sT-DCF) 和~94% (PT-DCF).
结论:
- 添加ULMA纤维放大器是有效的直接短脉冲放大直至半千瓦的水平.
- 开发的紧纤维激光系统提供了出色的光谱,空间和极化特性.
- 这些放大器代表了用于高功率短脉冲生成的多功能解决方案.
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