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34.3 W,172 μJ,1342 nm小秒主振荡器功率放大器功率放大器

Jiatong Li, Jiayu Zhang, Tiejun Ma

|August 13, 2025

概括

开发了一种新的高功率的皮秒激光系统,使用合的伊特正酸盐 (Nd:YVO4). 该系统在1.34微米皮秒激光器中实现了创纪录的平均功率,证明了极好的光束质量和稳定性.

科学领域:

光学和光子学在光学和光子学.
激光物理激光物理
材料科学材料科学材料科学

背景情况:

皮秒激光器对于各种科学和工业应用至关重要.
在1.34μm的高功率,高能量来源有需求.
激光晶体中的热效应可能会限制性能.

研究的目的:

为了展示一个高功率,高能量的1342纳米皮秒主振荡器功率放大器 (MOPA) 激光系统.
为了实现1.34微米皮秒激光器的最高平均功率.
为了保持出色的光束质量和功率稳定性.

主要方法:

使用了一个SESAM模式锁定振荡器和一个再生放大器.
使用四个主要放大阶段 (两个双通道,两个单通道).
使用低兴奋剂的Nd:YVO4晶体,无兴奋剂的末端盖和880nm激光二极管在带内送,以减轻热效应.
实施了球形偏差自我补偿方法,以维护光束质量.

主要成果:

从再生放大器获得710μJ的脉冲能量在10kHz.
产生的平均功率为34.3W,脉冲持续时间为15.4ps,脉冲能量为172μJ,在200kHz的峰值功率为11MW.
实现了迄今为止1.34微米皮秒激光器的最高平均功率.
保持良好的光束质量,M2系数为~1.31.
证明了3小时的电源稳定性,RMS = 0.89%.

结论:

开发的Nd:YVO4 MOPA激光系统代表了高功率皮秒激光技术的重大进步.
该系统的性能指标,包括记录平均功率,光束质量和稳定性,使其适用于苛刻的应用.
采用的技术有效地减轻了热效应,使得高功率运行成为可能.

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