title: Two-dimensional performance of uniform irradiation with the use of an edge-softened lens array and spectral dispersion.
abstract: A lens array composed of edge-softened elements is used to improve on-target irradiation uniformity in the Shenguang II Laser Facility, with which a Fresnel pattern of suppressed diffraction peaks is obtained. Additional uniformity can be reached by reducing short-wavelength interference speckles inside the pattern when the technique of smoothing by spectral dispersion is also used. Two-dimensional performance of irradiation is simulated and the results indicate that a pattern of steeper edges and a flat top can be achieved with this joint technique.
authors.affiliation: National Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China. jiang_x_j913@sohu.com
authors.forename: Xiujuan
authors.initials: X
authors.lastname: Jiang
authors.forename: Shenlei
authors.initials: S
authors.lastname: Zhou
authors.forename: Zunqi
authors.initials: Z
authors.lastname: Lin
authors.forename: Jian
authors.initials: J
authors.lastname: Zhu