基于超强超短激光装置泵浦源系统中搭建的百焦耳级钕玻璃激光器,实验分别测量了该钕玻璃激光器在一分钟一发、两分钟一发、三分钟一发的重复频率条件下工作的热致波前畸变。通过采集激光波前信息反映出受热效应影响大小,通过分析实验结果最终确定了百焦耳级钕玻璃激光器能够稳定工作的重复频率。目前该钕玻璃激光器能够在三分钟一发的重复频率条件下稳定输出波长为526.5 nm、能量约为100 J的高光束质量激光脉冲,输出光斑能量呈近平顶分布。最终由多台百焦耳级钕玻璃激光器组成的泵浦源系统能够稳定输出泵浦光并成功地应用于泵浦SULF 10 PW终端钛宝石主放大器。

Based on the 100-joule grade Nd∶glass laser built in the pump source system of the superintense utrafast laser facility, the experiment measured the thermally induced wavefront distortion of the Nd∶glass laser operating at repetition frequencies of one minute, two minutes, and three minutes. By collecting the laser wavefront information to reflect the size of the heat effect, the analysis and experimental results finally determine the repetition frequency of the 100-joule grade Nd∶glass laser that can work stably. At present, the Nd∶glass laser can stably output high-beam-quality laser pulses with a wavelength of 526.5 nm and an energy of about 100 J at the repetition frequency of three minutes, and the output spot energy shows a nearly flat-top distribution. Finally, the pump source system composed of several 100-joule grade Nd∶glass lasers can stably output pump light, and it has been successfully applied to pump the main Ti∶sapphire amplifier of SULF 10 PW system.