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为表征SILEX-Ⅰ超强超短脉冲钛宝石激光装置的性能,利用高空间分辨的哈特曼波前传感器实验研究了该系统的光束波前畸变特性。实验中采用俄罗斯科学院激光和信息技术研究所研制的自缩束哈特曼波前测量系统,哈特曼波前传感器的最大入射口径可达95mm,测量精度为0.08μm。得到激光脉冲在压缩前的P-V值仅为0.13λ(λ=800nm),RMS值为0.02λ;压缩后P-V值为0.63,λRMS值为0.09λ,并对实验结果进行了分析和讨论。结果表明,该激光装置具有良好的光束质量,其主要波前畸变来源于压缩池。
In order to characterize the performance of SILEX-Ⅰ super-short-pulse Ti: sapphire laser device, the wavefront distortion characteristics of the system were experimentally studied by using a highly-resolved Hartmann wavefront sensor. In the experiment, the self-shrinking Hartmann wavefront measurement system developed by Institute of Laser and Information Technology of Russian Academy of Sciences was used. The maximum entrance diameter of Hartmann wavefront sensor can reach 95mm and the measuring accuracy is 0.08μm. The P-V value of the laser pulse before compression was only 0.13λ (λ = 800nm), the RMS value was 0.02λ, the P-V value after compression was 0.63 and the λRMS value was 0.09λ. The experimental results were analyzed and discussed. The results show that the laser device has a good beam quality, the main wavefront distortion from the compression cell.