以单脉冲能量更高的孤子激光器为种子源，通过主振荡放大技术，获得了2 μm波段的高功率、皮秒脉冲激光器.该种子源是一个被动锁模的光纤激光器，通过优化、管理激光器谐振腔内的色散，获得了脉冲宽度为50 ps、重复频率为55.6 MHz、谱宽约为21 nm的高能量孤子脉冲输出.利用单模光纤在2 μm波段的负啁啾色散特性，在进行功率放大之前将作为种子源的激光脉冲宽度展宽至600 ps.最后，经过两级放大之后，获得平均功率约23 W、脉宽为660 ps的激光输出.利用光栅对，对放大后的激光脉冲进行压缩，经测试压缩后的脉冲宽度约为0.9 ps.

Thulium-doped fiber Master Oscillator Power Amplifier(MOPA) was demonstrated for high power picosecond laser within the 2 μm wavelength range with a high energy soliton seed. The master oscillator was a passively mode-locked fiber laser, which can generate high energy soliton pulses with 50 ps pulse width, a repetition frequency of 55.6 MHz and a spectral width of ~21 nm by managing and optimizing its dispersion. The seed pulse was stretched to ~600 ps by a spool of passive fiber with anomalous dispersion before sent to two amplified stages. Finally, average power of about 23 W and pulse duration of 660 ps were achieved before the pulse compressor. With a grating-pair compressor, the chirped pulse can be compressed to about 0.9 ps.