We demonstrate a high repetition rate, high energy chirped pulse amplification (CPA) system based on single crystal fiber (SCF) amplifier. With home-made all-fiber laser as the seed laser and Yb:YAG rod, SCF as the amplification gain medium, an output power of 61.8 W at 200 kHz repetition rate has been obtained. To the best of our knowledge, this is the highest power based on SCF at hundreds of kHz repetition rate. The measured M² values are approximately 1.241 in the horizontal and 1.186 in the vertical direction. The spectrum width is 3.8 nm, which support Fourier transform-limited pulse duration of 411 fs. An average power of 41.8 W with pulse duration of 1.5 ps has been obtained after the chirped volume Bragg grating (CVBG) compressor, which will be compressed to hundreds of fs with accurate chirp compensation.

我们演示了基于单晶光纤（SCF）放大器的高重复率，高能量chi脉冲放大（CPA）系统。使用自制的全光纤激光器作为种子激光器，并使用Yb：YAG棒，SCF作为放大增益介质，在200 kHz重复频率下可获得61.8 W的输出功率。据我们所知，这是在数百kHz重复频率下基于SCF的最高功率。测得的M ²水平值约为1.241，垂直方向约为1.186。光谱宽度为3.8 nm，支持411 fs的傅立叶变换限制脉冲持续时间。volume体积布拉格光栅（CVBG）压缩器之后，已获得41.8 W的平均功率和1.5 ps的脉冲持续时间，该压缩器将通过精确的chi补偿将其压缩到数百fs。