构建了内腔主动光学(ICAO)系统的工作流程模型, 并通过数值模拟验证了在高功率固体激光器中使用ICAO进行波前校正的可行性。利用一个具有严重热致像差的千瓦级热容激光器, 说明ICAO系统对该激光器的输出性能有本质性提升, 由此验证了ICAO布局和控制算法的可行性。物理上ICAO系统与腔内其他物理现象存在复杂的耦合, 数值模拟表明这种耦合使得系统对大的误差比较敏感, 因此要求在所需求补偿的像差阶数、波前传感器子孔径数目和变形镜单元数之间有恰当的匹配关系。

A theoretical model on the intra-cavity adaptive optic (ICAO) system is proposed. The method of numerical simulation is used to prove its possibility in the high power solid-state lasers. The study on a heat capacity laser with larger intra-cavity aberrations and kilo-watt output shows that the ICAO system improves the beam quality significantly. Therefore, the ICAO configuration and the control process are checked theoretically. Physically there are complicated non-linear couplings among ICAO and other physics processes inside the resonator. The simulations show that the ICAO system is sensitive to certain errors due to these couplings. Therefore, a subtle match among number of the sub-piles of the wavefront sensor, unit distribution of the deformable mirror and order of the aberrations expected to be compensated is required.