Laser diode pumped Nd: YAG laser with high repetition and high average power

搭建了一台高重复频率、高峰值功率、高平均功率的激光器. 激光器主要包括三部分: 单纵模光纤种子源、激光二极管阵列抽运的Nd:YAG再生放大器和四程放大器. 系统获得了平均功率11 W、重复频率100 Hz、脉冲能量112 mJ、脉宽500 ps2 ns可调的激光输出, 工作波长1064 nm. 输出光束口径6.8 mm, 1.5倍衍射极限, 近场光强近平顶分布, 能量稳定性为0.72%.In our work we build a high repetition, high peak power and high average power laser which contains three main components: the fiber oscillator, the Nd : YAG regenerative amplifier, and the four-pass amplifier side-pumped by laser diode. The wavelength is 1064 nm. The laser operates at 100 Hz with pulse energies up to 112 mJ. And the average power is 11 W. The pulse width is tunable from 500 ps to 2 ns. The radius of the beam is 6.8 mm. The spatial profile of the beam presents nearly a top hat in the near filed and 1.5x diffraction-limited in the far filed