Computation of topological charges of optical vortices via non-degenerate four-wave-mixing

Abstract

In this paper, we report an experiment, which demonstrates computation of topological charges of two optical vortices via non-degenerate four-wave-mixing process. We show that the output signal beam carries orbital angular momentum which equals to the subtraction of the orbital angular momenta of the probe light and the backward pump light. The ⁸⁵Rb atoms are used as the nonlinear medium, which transfer the orbital angular momenta of lights.

3 pages, 3 figures

Cited by in corpus (5)

• Collapses and revivals of stored orbital angular momentum of light in a cold atomic ensemble
• Entanglement of the orbital angular momentum states of the photons generated in a hot atomic ensemble
• Frequency up-conversion and arbitrary sum arithmetic of lights with orbital angular momentum
• Off-axis retrieval of orbital angular momentum of light stored in cold atoms
• Ultrafast photonic rainbow with controllable orbital angular momentum