用哈特曼法研究自由旋涡气动窗口光束质量

 利用37单元哈特曼波前传感器实验研究不同工作条件下不同时刻自由旋涡气动窗口对输出激光波前的影响。将高速CCD所采集的畸变激光波前传送给高速波前处理机，采用模式法对其进行波前重构，进而计算给出畸变波前的波像差峰谷值、波像差均方根和斯特列尔比值等相关光学参数随气动窗口工作条件不同的变化曲线。结果表明，自由旋涡气动窗口对输出激光波前的影响主要是光束偏转和离焦，特别是气动窗口工作在设计状态时，其余低阶及高阶像差都比较小，能够满足实际需要。哈特曼波前传感器能很好地用于自由旋涡气动窗口对激光波前影响的二维动态测量，并能给出波前畸变的各项Zernike多项式的模式系数得到畸变波前，直接为气动窗口与强激光发射系统的对接和波前校正提供数据。

Study on the optical quality of the free-vortex aerodynamic window using Hartmann-Shack sensing

This paper studies the optical quality such as the peak value (PV) of wavefront error, rms and strehl ratio (R S) of the free-vortex aerodynamic window(FADW) designed for the high energy lasers using the Hartmann-Shack sensing under different inlet total pressures experimentally. The results show that the effects on the output laser wavefront of the FADW are mainly the beam deflexion and the beam divergence, the other high-level wavefront errors are very low. And the FADW can meet our needs. The Hartmann-Shack sensing can be used to measure the 2-dimensional disturbed wavefront through the FADW dynamically and it can be used to launch and correct the high energy laser out of the FADW.