摘要
In the Fresnel transform domain, an effective improvement to the conventional iterative algorithm for designing the diffractive optical elements (DOEs) used for spatial beam shaping has been proposed. The algorithm can successfully achieve to design DOEs for beam shaping. Compared with conventional algorithm, this algorithm can provide faster convergence, more powerful ability to overcome local minimum problem and better shaping quality. By computer simulation, the result has shown that the DOEs designed by this algorithm has snch advantages as high uniformity at the main lobe, low profile error and steep edge.
In the Fresnel transform domain, an effective improvement to the conventionaliterative algorithm for designing the diffractive optical elements (DOEs) used for spatial beamshaping has been proposed. The algorithm can successfully achieve to design DOEs for beam shaping.Compared with conventional algorithm, this algorithm can provide faster convergence, more powerfulability to overcome local minimum problem and better shaping quality. By computer simulation, theresult has shown that the DOEs designed by this algorithm has snch advantages as high uniformity atthe main lobe, low profile error and steep edge.
基金
NationalFoundationofHighTechnologyofChina( 863- 4 16- 2 - 3.7)
NationalResearchFoundationforFundamentalKeyProjects"973"ofChina(G19990 330 )
关键词
衍射光学
波束成形
菲涅耳区域
激光
fresnel domain
diffractive optical elements
beam shaping
