Quadric hologram-based self-conjugation of vortex beams

Abstract

Self-conjugation of singular (vortex) beams by a static nonlinearly recorded hologram is reported. Diagnostics of phase-conjugated vortices is implemented using an original technique based on Young’s model of diffraction phenomena. It has been shown that the phase-conjugated vortex is characterized by the same topological charge as the vortex reversed through four-wave degenerate mixing being different in sign from the vortex reflected by a common mirror.