10.6084/m9.figshare.5632231.v1 Saifollah Rasouli Saifollah Rasouli Davud Hebri Davud Hebri Visualization 1.avi Optica Publishing Group 2018 Optical Vortices Diffraction and gratings Singular optics, topological defects Optical Communications 2018-03-08 16:01:32 Media https://opticapublishing.figshare.com/articles/media/Visualization_1_avi/5632231 Calculated diffraction patterns from an amplitude radial grating with m=10 illuminated by the vortex beams with w=2mm and l= 3, 10 at different propagation distances in the range from z=0 to z=10z_T. For the cases l= m= 10 by propagation, beams' energy are flowing towards the optical axes. All dimensions are in millimeters.