以被动调Q的固体薄片激光器作为种子光源，以中心波长976 nm的半导体激光器为抽运源，通过端面抽运耦合，搭建了窄脉宽双包层掺镱光纤放大器。实验研究了前向、后向端面抽运方式对窄脉宽双包层掺镱光纤放大器的输出平均功率、激光光谱、脉冲宽度等特性的影响，并进行分析讨论。结果表明,采用后向抽运方式，窄脉宽双包层掺镱光纤放大器，获得了平均功率为9.3 W的放大激光输出，重复频率为10 kHz，脉冲宽度为450 ps，峰值功率大于2 MW。

A subnanosecond pulsed, one-stage Yb-doped fiber master oscillator power amplifier (MOPA) system for different pumping constructions is reported, which is seeded by a passively Q-switched NdYAG microchip laser. The comparison and discussions of average power, spectrum, together with pulse temporal profile of output laser under the forward pumping and backward pumping conditions are presented. Results show that the latter one provides the better performance, in which average output power as high as 9.3 W is achieved with pulse duration of 450 ps at 10 kHz repetition rate. The corresponding peak power is higher than 2 MW.