title: Self-localized structures in vertical-cavity surface-emitting lasers with external feedback.
abstract: In this paper, we analyze a model of broad area vertical-cavity surface-emitting lasers subjected to frequency-selective optical feedback. In particular, we analyze the spatio-temporal regimes arising above threshold and the existence and dynamical properties of cavity solitons. We build the bifurcation diagram of stationary self-localized states, finding that branches of cavity solitons emerge from the degenerate Hopf bifurcations marking the homogeneous solutions with maximal and minimal gain. These branches collide in a saddle-node bifurcation, defining a maximum pump current for soliton existence that lies below the threshold of the laser without feedback. The properties of these cavity solitons are in good agreement with those observed in recent experiments.
authors.affiliation: Institute of Physics, NASB, Belarus, Scaryna Prospekt 70, 220072 Minsk, Belarus and Department of Physics, University of Strathclyde, 107 Rottenrow East, Glasgow G4 0NG, United Kingdom.
authors.forename: P V
authors.initials: PV
authors.lastname: Paulau
authors.forename: D
authors.initials: D
authors.lastname: Gomila
authors.forename: T
authors.initials: T
authors.lastname: Ackemann
authors.forename: N A
authors.initials: NA
authors.lastname: Loiko
authors.forename: W J
authors.initials: WJ
authors.lastname: Firth