描述了采用国内新型高效的二倍频晶体ＫＴＰ和四倍频晶体ＬＡＰ建立起来的一套稳定可靠的１．０６μｍ脉冲激光四倍频系统，通过计算机模拟确定了运行参数的最佳值，从而使谐波器件的转换效率提高，另外还分析了失配角Δθ，光功率密度等因素对倍频效率的影响。该系统产生的超短紫外光脉冲对Ｘ光条纹相机的动态参数及带时标的条纹相机的研究具有重要意义。实验测得最短的紫外光脉冲宽度为５ｐｓ Describes a stable and reliable 1.06μm pulsed laser quadruple frequency multiplier system, which is built by using the new efficient double frequency crystal KTP and quadruple frequency crystal LAP in our country. Through computer simulation, the optimal operating parameters are determined so that Harmonic conversion efficiency of the device increased, in addition to analysis of the mismatch angle Δθ, optical power density and other factors on the frequency doubling efficiency. The ultra-short UV pulse generated by this system is of great significance to the dynamic parameters of X-ray streak camera and the research of streak camera with time-scale. The experiment measured the shortest UV pulse width of 5ps