4×2×3片状放大器光束动态波前畸变实验研究

Experiment research of beam dynamic wavefront distortion of 4×2×3 multi-segment-amplifier

利用高空间分辨率的哈特曼波前传感器实验研究了新型阵列式大口径片状放大器的光束波前畸变特性。哈特曼波前传感器的微透镜阵列数为 3 2× 3 2 ,放大器的通光口径为 2 9cm× 2 9cm。在充电电压为 2 0kV、泵浦能密度为 7.2 8J/cm3的条件下 ,得到了放大器端部模块全口径范围内光束波前双程畸变量为 :P -V值为 1.613λ ,RMS值为 0 .3 99λ(λ=1.0 5 3 μm) ,并对实验结果进行了分析和讨论。

In this paper,the beam wavefront distortion of the new-style multi-segment-amplifier with each aperture of 29cm×29cm was tested by a Hartmann-shack wavefront sensor at different condition,the Hartmann lens focusing points are 32×32.Under the condition of charge voltage of 20kV and pumping energy density of 7.28J/cm 3,the dynamic wavefront distortion in double length of interior module is 1.613λ of P-V and 0.399λ of RMS(λ=1.053μm),and the experiment results are discussed here.