新型LD泵浦振荡器与多程放大系统联机实验

Experimental research for united new LD-pumped oscillator and multipass amplifier system

新型LD泵浦振荡器采用环形结构,具有单纵模几率高、时间波形和幅度高度稳定等特点,这些特点使其与多程放大器的联机非常方便,没有系统多脉冲注入破坏风险和能量不稳破坏风险。联机实验取得了显著成果,输出能量达1.252kJ,是当前国内固体激光器单束输出最高能量,此时输出脉冲脉宽为1.26ns,光束口径为20cm×20cm,平均功率密度达2.5GW/cm2。

The newly developed LD-pumped oscillator is ring structured. This oscillator has such advantages as almost 100% possibility for single-longitude-mode output, high stability for the waveform and amplitude of the output pulse. These advantage make it convenient to be united with the multipass amplifier system. Experimental research on the united LD-pumped oscillator and the multipass amplifier has got great achievement. The output energy has attained 1.252 J, which is the highest energy for single beamline solid-state laser in China. The pulse width for this shot is 1.26 ns, and the size for this shot is 20 cm × 20 cm. So the average power density is 2.5 GW/cm2.