Binary rectangular phase gratings applied to spatial shaping of Gaussian beam

The study of basic principle and the theoretical analysis of the transmitted binary rectangular phase gratings for spatial shaping of Gaussian beam are presented in this paper.Practically,it is important to make the binary rectangular gratings.So the technical specifications of the gratings are summarized,and the experimental works and the experimental results are analyzed in details.Technical indices for the transmitted binary rectangular phase grating:width of the grating groove:1.5mm;depth of the grating groove:0.55μm;effective size of the grating:15mm;transmitivity:90%;wavelength coverage:0.55μm～0.65μm;damage threshold:10W on average.Shaping parameters:power efficiency:75%;energy efficiency: 90%;diffraction distance:10m;radial fluctuation of beam intensity after shaping:9.3%.