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

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 252J, which is the highest energy for single beamline solid-state laser in our country. The pulse width for this shot is 1.26ns, and the size for this shot is 20cm×20cm. So the average power density is 2.5GW/cm2.