Collection Of theses on high power laser and plasma physics, 2008, 6 (1): 11, Published Online: Oct. 9, 2009
Spatial Laser Beam Shaping Using Binary Panels
激光系统 空间整形 二元面板 增益预补偿 填充因子 laser system spatial shaping binary panels gain precompensation filling factor
Abstract
In order to improve the energy efficiency of the inertial confined fusion (ICF) high-power laser system and use the optical energy sufficiently, it is necessary to convert Gaussian laser beam into uniform beam, or into parabolic-like beam to precompensate the spatially dependent gain of the Nd∶glass amplifiers, for the sake of uniform output distribution at the target. The intensity control is obtained with panels composed of binary pixelated arrays of metal pixels, which was designed by error diffusion method. The shaping effect is numerically simulated. The factors, which will influence the shaping effect, such as mismachining of the panel and size of the pinhole of the spatial filter are discussed. An anti-gaussian distribution and a parabolic distribution binary panels are fabricated. The experimental shaping result is given and the error is analyzed. Binary panels are proved to be excellent shaping elements in modeling the intensity of laser.
Xie Jie, Fan Wei, Li Xuechun, Lin Zunqi. Spatial Laser Beam Shaping Using Binary Panels[J]. Collection Of theses on high power laser and plasma physics, 2008, 6(1): 11.