针对激光切片技术缺少重频可调激光光源, 设计了一种脉冲平均功率35.4W, 脉宽12ps, 重复频率300kHz~1MHz可调的高功率掺镱光纤皮秒脉冲激光器。激光器采用全光纤振荡器及预放大系统, 配合基于棒状光子晶体光纤的主放大系统, 并通过在级联放大中加入声光调制器（AOM）调控重复频率, 从而实现重复频率可调的高功率皮秒脉冲输出。激光器振荡器及预放大部分的全光纤设计, 相较于空间耦合放大具有光路结构简单、环境稳定性高等特点, 有望推动高能量飞秒光纤激光工业化进程, 提升其在复杂使用环境的适应性。

A Yb-doped picosecond fiber laser with 35.4W for average power, 12ps for pulse duration, and 300kHz~1MHz for repetition rate is designed based on cascade amplification. The oscillator and the pre-amplification system are comprized of all fiber. Rod-type photonic crystal fiber is used as the gain medium of the main amplifier. The output repetition rate can be adjust from 300kHz to 1MHz by an Acousto-Optic Modulator (AOM). The all-fiber design of the oscillator and the pre-amplifiers has the characteristics of simple optical path structure and high environmental stability, which is expected to promote the industrialization process of high-energy femtosecond fiber laser and improve its adaptability under complex environment.