光学学报, 2013, 33 (8): 0814002, 网络出版: 2013-07-09
高功率激光驱动器波前残余像差研究
Residual Wavefront Aberration of High-Power Laser Facility
摘要
准确预校正大能量激光发射时的动态波前像差是高功率激光驱动器自适应光学波前质量控制的关键。基于闭环预校正实验数据,利用神光II升级装置波前传输模型计算动态波前预校正偏差,获得更为准确的变形镜校正面形;再利用基于驱动器位置相位校正的变形镜控制算法修正变形镜的驱动电压,可提高动态波前预校正的准确性,降低激光装置大能量发射实验时输出光束的波前残余像差。在神光II升级激光装置上采用该技术获得了比传统的基于闭环预校正的波前控制技术更好的波前控制效果,使得大能量激光发射实验中光束顺利过孔,保障了装置的安全运行,并且明显改善了输出光束的波前质量,提高了大能量激光发射实验的成功率。
Abstract
The core of adaptive optics wavefront control of the high-power laser facility is to pre-correct the dynamic wavefront aberration of the high-energy laser accurately. Based on the experimental data of closed-loop pre-correction and using the wavefront propagation model of the SG-II updated laser facility, the deviation of the pre-corrected dynamic wavefront aberration is calculated, and the more accurate deformed-shape of the deformable mirror is obtained. Then using the deformable mirror control algorithm that based on the phase correction at the actuator position to correct the driving voltage of the deformable mirror, so that the accuracy of the pre-corrected dynamic wavefront aberration is improved, and the residual wavefront aberration of the output high-energy laser shot is reduced. Comparing with the traditional technology that based on the closed-loop pre-correction of the dynamic wavefront aberration, this technology has a better control effect in the SG-II updated laser facility, so that the high-energy laser beam can pass through the filtering hole smoothly, the safety of the laser facility is ensured, the wavefront quality of the output laser is improved obviously, and the success rate of the high-energy laser emission experiment is increased.
郭爱林, 朱海东, 唐仕旺, 谢兴龙, 朱健强. 高功率激光驱动器波前残余像差研究[J]. 光学学报, 2013, 33(8): 0814002. Guo Ailin, Zhu Haidong, Tang Shiwang, Xie Xinglong, Zhu Jianqiang. Residual Wavefront Aberration of High-Power Laser Facility[J]. Acta Optica Sinica, 2013, 33(8): 0814002.