Research on characteristics of partially coherent circularly polarized vortex beam in oceanic turbulence

Abstract

The expression of partially coherent circularly polarized vortex beams (PCCPVBs) is introduced, and the matrix elements of a PCCPVB in oceanic turbulence are derived. The evolution of intensity and coherence of such PCCPVB is studied. The ring shape of a PCCPVB will gradually lose and become a spot pattern during propagation, and the PCCPVB with a smaller $\sigma$, and $M$ will become a spot pattern more quickly. The intensity of a PCCPVB can show the flat profile when this PCCPVB propagates in free space, and the same PCCPVB in oceanic turbulence can show the Gaussian profile. The coherence of a PCCPVB in oceanic turbulence will decrease faster than the same PCCPVB in free space. The results may find application in underwater optical systems using circularly polarized beams.