title: Vortex solitons in lasers with feedback.
abstract: We report on the existence, stability and dynamical properties of two-dimensional self-localized vortices with azimuthal numbers up to 4 in a simple model for lasers with frequency-selective feedback.We build the full bifurcation diagram for vortex solutions and characterize the different dynamical regimes. The mathematical model used, which consists of a laser rate equation coupled to a linear equation for the feedback field, can describe the spatiotemporal dynamics of broad area vertical cavity surface emitting lasers with external frequency selective feedback in the limit of zero delay.
authors.affiliation: IFISC (CSIC-UIB), Campus Universitat Illes Balears, E-07122 Palma de Mallorca, Spain. pavel@ifisc.uib-csic.es
authors.forename: P V
authors.initials: PV
authors.lastname: Paulau
authors.forename: D
authors.initials: D
authors.lastname: Gomila
authors.forename: P
authors.initials: P
authors.lastname: Colet
authors.forename: N A
authors.initials: NA
authors.lastname: Loiko
authors.forename: N N
authors.initials: NN
authors.lastname: Rosanov
authors.forename: T
authors.initials: T
authors.lastname: Ackemann
authors.forename: W J
authors.initials: WJ
authors.lastname: Firth