Enhanced vortex beams resistance to turbulence with polarization modulation. (April 2019)

• Record Type: Journal Article
• Authors: Cheng, Mingjian; Guo, Lixin; Li, Jiangting; Li, Jiachao; Yan, Xu
• Is Part Of: Journal of quantitative spectroscopy & radiative transfer. Volume 227(2019)
• Page Start: 219
• Page End: 225
• Publication Date: 2019-04
• Subjects: Atmospheric propagation -- Radially polarized vortex beam -- Intensity evolution -- Beam spreading and wander; Spectrum analysis -- Periodicals; Radiation -- Periodicals; Analyse spectrale -- Périodiques; Rayonnement -- Périodiques; Radiation; Spectrum analysis; Periodicals; 543.0858
• DOI: 10.1016/j.jqsrt.2019.02.005
• Languages: English
• ISSNs: 0022-4073

Abstract

Highlights: Propagation model of radially polarized vortex beams in atmospheric turbulence is established. A radially polarized vortex beam can reduce beam spreading and wander effects in the atmosphere. Polarization modulation can be an approach to mitigate turbulent effects on OAM-based systems. Abstract: Adopting a vortex beam with poor coherence can reduce turbulence-induced beam spreading and wander effects in the atmosphere, but it intensifies the degradation rate of its beam profile from a doughnut shape into a Gaussian shape. Transmission quality of Orbital–angular–momentum (OAM) mode carried by a vortex beam is closely related to its evolution of intensity distribution. After appropriate polarization modulation, a radially polarized vortex beam has a better performance on the reduction of beam spreading and wander effects than its scalar counterpart. A radially polarized vortex beam can also lower the degradation rate of its beam profile and keep "OAM information" a longer distance. Therefore, appropriate polarization modulation can be an effective approach to mitigate the adverse turbulent effects on OAM-based systems operated in the atmosphere.