Numerical investigation of the influence of wavefront distortion on the laser near-field characteristics

被引：2
作者：
Li, S. [1 ,2 ]
Lu, Z. [2 ]
Fan, X. [3 ,4 ]
Ding, L. [5 ]
机构：
[1] Sci & Technol Electroopt Informat Secur Control L, Tianjin 300308, Peoples R China
[2] Harbin Inst Technol, Natl Key Lab Sci & Technol Tunable Laser, Harbin 150080, Heilongjiang, Peoples R China
[3] Weifang Univ, Inst New Electromagnet Mat, Weifang 261061, Peoples R China
[4] Weifang Univ, Sch Phys & Optoelect Engn, Weifang 261061, Peoples R China
[5] China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621900, Peoples R China
来源：
LASER AND PARTICLE BEAMS | 2017年 / 35卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Diffraction theory; Laser propagation; Near-field beam quality; Wavefront distortion; NDGLASS LASER; PROPAGATION; PERFORMANCE; FUSION; OPTIMIZATION; SYSTEM; BEAMS;
D O I：
10.1017/S0263034617000738
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The effect of the initial phase distortion of the laser on near-field transmission characteristics in free space is investigated both numerically and theoretically. It is demonstrated and proposed that the near-field modulation and fluence contrast of the output laser beam are changing with the increase of both spatial low- and high-frequency wavefront distortion. The simulation results show that in order to ensure the beam quality in propagation, the Fresnel number should be controlled not <50 generally and the wavefront distortion should also be minimized by controlling both low- and high-frequency phase coefficient not larger than 0.6.
引用
收藏
页码：648 / 655
页数：8
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