Fig. 4

a (left to right) The spiral phase profile corresponding to TC \(l= +1\) is added to a linear phase profile (carrier) and then wrapped by \(2\pi\) to generate the hologram pattern \(H_1\), which then reconstructs the optical vortex beam of TC \(l=+1\), b the spiral phase corresponding to TC \(l=+2\) is added to a linear phase profile (carrier) and then wrapped by \(2\pi\) to compute the hologram pattern \(H_2\), which then reconstructs the optical vortex beam of TC \(l=+2\), c The phases of holograms \(H_1, H_2, \ldots , H_n\) are added together to generate the multiplexed hologram, which when reconstructed emits all the corresponding vortices as an array