Up to 1.4 J TEM 00 mode output pulse (10 ns, 10 pps) with 1.1 diffraction limited divergence can be obtained by using VRM unstable resonator and one amplifier. The effeciency of SHG is 60% and THG is 30%.

• 在此理论基础上，设计了NdYAGQ开关（电光调Q）高功率高光束质量的激光系统，获得了脉冲能量为1.；4JTEM00模，脉宽10ns，重复频率10pps，束散度达到衍射极限的1