From one- to two-dimensional solitons in the Ginzburg-Landau model of lasers with frequency-selective feedback

P. V. Paulau, D. Gomila, P. Colet, B. A. Malomed, W. J. Firth

Research output: Contribution to journalArticle

Abstract

We use the cubic complex Ginzburg-Landau equation linearly coupled to a dissipative linear equation as a model for lasers with an external frequency-selective feedback. This system may also serve as a general pattern-formation model in media driven by an intrinsic gain and selective feedback. While, strictly speaking, the approximation of the laser nonlinearity by a cubic term is only valid for small field intensities, it qualitatively reproduces results for dissipative solitons obtained in models with a more complex nonlinearity in the whole parameter region where the solitons exist. The analysis is focused on two-dimensional stripe-shaped and vortex solitons. An analytical expression for the stripe solitons is obtained from the known one-dimensional soliton solution, and its relation with vortex solitons is highlighted. The radius of the vortices increases linearly with their topological charge m, therefore the stripe-shaped soliton may be interpreted as the vortex with m = infinity, and, conversely, vortex solitons can be realized as unstable stripes bent into stable rings. The results for the vortices are applicable for a broad class of physical systems.
Original languageEnglish
Article number036213
JournalPhysical Review E
Volume84
Issue number3
DOIs
Publication statusPublished - 23 Sep 2011

Keywords

  • vortex solitons
  • dissipative solitons
  • optical solitons
  • stability
  • 2-component active systems
  • Ginzburg-Landau model
  • frequency-selective feedback
  • lasers

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