title: Orbital angular momentum of optical vortices from power measurements and the cross-correlation function.
abstract: We show that the complex-amplitude cross-correlation function between two beams can be obtained by the global Stokes parameters. We apply this approach to determine the topological charge of a Laguerre-Gaussian (LG) beam by performing power measurements only. Additionally, we study the connection of the cross-correlation function with the degree of polarization for nonuniformly polarized beams, and we obtain closed-form expressions of the cross correlation for LG vector modes and the generalized full Poincaré beams.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Perez-Garcia
authors.forename: Dorilian
authors.initials: D
authors.lastname: Lopez-Mago
authors.forename: Hipolito
authors.initials: H
authors.lastname: Garcia-Gracia
authors.forename: Jorge A
authors.initials: JA
authors.lastname: Garza-Alanis
authors.forename: Raul I
authors.initials: RI
authors.lastname: Hernandez-Aranda
authors.forename: Julio C
authors.initials: JC
authors.lastname: Gutiérrez-Vega