Ideal suppression of Bessel beam intensity oscillations with a vortex phase plate

We propose what we believe to be a new kind of diffrac-tive phase element, i.e., vortex phase plate (VPP) with phase singularities along the azimuth direction. Phase function of the proposed VPP is given analytically. Axial intensity oscil-lations of propagating Bessel beams are ideally suppressed by using the proposed VPP. Compared with the traditional amplitude mask, the proposed VPP takes such advantages as a simpler fabrication procedure and a lower cost.(c) 2023 Optica Publishing Group