title: Phase dynamics of continuous topological upconversion in vortex beams.
abstract: The vortex emergence process as an integer order Bessel field progresses continuously onto the contiguous higher order Bessel field is studied in detail. We assess the progressive migration of phase singularities and explain the predicted increase in fractional orbital angular momentum content of the beam in terms of this gradual process.
authors.affiliation: Photonics and Mathematical Optics Group, Tecnológico de Monterrey, México.
authors.forename: Carlos
authors.initials: C
authors.lastname: López-Mariscal
authors.forename: Daniel
authors.initials: D
authors.lastname: Burnham
authors.forename: Daniel
authors.initials: D
authors.lastname: Rudd
authors.forename: David
authors.initials: D
authors.lastname: McGloin
authors.forename: Julio C
authors.initials: JC
authors.lastname: Gutiérrez-Vega
mesh_terms: D003198:Computer Simulation; D008027:Light; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation