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低于50-fs的克尔镜头模式锁定的Yb化激光器,光学效率为44%

Xiancui Su, Yiran Wang, Liangbi Su

|March 4, 2024

概括

研究人员从 (Yb) 化激光器中实现了50 femtosecond (fs) 以下的脉冲,克服了效率权衡. 这项工作展示了一种新的Yb,Gd:CaSrF2晶体,用于高效超快激光应用.

科学领域:

激光物理激光物理
材料科学材料科学材料科学

背景情况:

化物晶体对超高速激光器具有前景.
一个关键的挑战是平衡短脉冲持续时间与高光学效率.

研究的目的:

开发一种高效的超快激光器,使用Yb化晶体.
为了实现低于50 femt秒的脉冲持续时间,具有高光学效率.

主要方法:

使用了一个Yb,Gd:CaSrF2晶体.
采用976nm光纤激光器进行送.
使用的镜子和镜对来进行分散补偿.
实现了凯尔镜头模式锁定.

主要成果:

产生50 fs以下的脉冲 (最短46 fs),光学效率>40%.
实现了620mW的最大输出功率,用于锁定模式的操作.
证明稳定模式锁定,输出功率波动<0.3% RMS.
获得光束质量因子M2 <1.14.4.
在连续波运行中达到780mW的输出功率,光学效率为55.3%.

结论:

这项研究报告了迄今为止Yb化激光器的最短脉冲.
实现了低于100 fs Yb批量激光器的最高光学效率.
Yb,Gd:CaSrF2晶体显示了先进激光应用的巨大潜力.

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