光学学报, 2020, 40 (11): 1132001, 网络出版: 2020-06-10
压缩聚焦过程中的波前畸变对远场时空分布影响 
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Wavefront Distortion Effect on Far-Field Spatio-Temporal Distribution in Compression and Focusing Process
超快光学 脉冲压缩 超快激光 衍射光栅 波前畸变 时空特性 ultrafast optical pulse compression ultrafast lasers diffraction gratings wavefront distortion spatio-temporal property
摘要
针对超高峰值功率激光系统中脉冲的压缩及聚焦过程进行建模,基于光线追迹法和夫琅禾费衍射方法对平行光栅对压缩器的色散过程和抛物面镜的聚焦过程进行了模拟分析,同时采用Square-Radial多项式对方形口径的波前畸变进行描述,分析了近场存在4种不同波前畸变情况时对远场时空分布的影响,定量给出了不同情况下波前畸变误差的允许范围。
Abstract
In this study, we establish a theoretical model of pulse compression and focusing process in an ultrahigh peak power laser system and simulate the dispersion process of parallel grating pair compressor and the focusing process of parabolic mirror based on ray-tracing method and Fraunhofer far-field diffraction. The wavefront distortion for a square diameter is described using the Square-Radial polynomial. The effect of four different wavefront distortions in near-field on the far-field spatio-temporal distribution is analyzed, and the error tolerance is provided under different conditions.
胡必龙, 王逍, 李伟, 曾小明, 母杰, 左言磊, 王晓东, 吴朝辉, 粟敬钦. 压缩聚焦过程中的波前畸变对远场时空分布影响[J]. 光学学报, 2020, 40(11): 1132001. Bilong Hu, Xiao Wang, Wei Li, Xiaoming Zeng, Jie Mu, Yanlei Zuo, Xiaodong Wang, Zhaohui Wu, Jingqin Su. Wavefront Distortion Effect on Far-Field Spatio-Temporal Distribution in Compression and Focusing Process[J]. Acta Optica Sinica, 2020, 40(11): 1132001.
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