研究了一台基于主振荡功率放大(MOPA)结构的全光纤结构脉冲激光器。利用声光调Q,获得了平均功率约为500mW的脉冲种子源,采用一级预放大器使输出脉冲放大到10W;主放大器利用一台中心波长为976nm的带尾纤的半导体激光器对掺Yb3+双包层光纤抽运。最终在40kHz的重复频率下实现了中心波长为1064nm、脉宽为2.4μs、平均功率大于100W、脉冲能量达到2.63mJ、输出光束的M2因子为1.2的激光脉冲输出。 An all-fiber structure pulsed laser based on the main oscillator power amplifier (MOPA) is studied. By using the acousto-optic tuning Q, a pulsed seed source with an average power of about 500 mW was obtained, and a primary preamplifier was used to amplify the output pulse to 10 W. The main amplifier utilized a pigtailed semiconductor laser with a center wavelength of 976 nm for Yb3 + Cladding optical fiber pump. Finally, a laser pulse with a center wavelength of 1064 nm, a pulse width of 2.4 μs, an average power of more than 100 W, a pulse energy of 2.63 mJ and an M2 factor of 1.2 is finally obtained at a repetition frequency of 40 kHz.