采用双直角棱镜(DRP)腔,利用直角棱镜(RP)的自对准特性,使激光器系统对冲击、振动及温度波动保持不灵敏性。当激光器重复频率为20 Hz时,输出能量为60 mJ,脉冲宽度为11ns,经过10倍扩束后发散角为0.11mrad,30s内光轴漂移量小于5μrad。DRP腔能够有效改善激光器光轴的稳定度。采用偏振耦合输出时,波片参数和RP材料决定耦合输出率。根据理论研究及光机电一体化设计,成功研制出高光轴稳定度激光器。该研究对DRP激光谐振腔的参数设计和高光轴稳定度激光器的工程化应用具有一定指导意义。 Using a double right-angle prism (DRP) cavity, the self-alignment of right-angle prisms (RPs) keeps the laser system insensitive to shock, vibration and temperature fluctuations. When the laser repetition frequency is 20 Hz, the output energy is 60 mJ and the pulse width is 11 ns. The divergence angle is 0.11 mrad after 10 times beam expander, and the optical axis drift is less than 5 μrad within 30 seconds. DRP cavity can effectively improve the stability of the laser optical axis. When using a polarization-coupled output, wave plate parameters and RP material determine the coupling output rate. According to theoretical research and optical-mechanical-electrical integration design, successfully developed a high optical axis stability laser. The research is of guiding significance to the parameter design of DRP laser cavity and the engineering application of the laser with high optical axis stability.