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Modulational instability and soliton trains in a model for two-mode fiber ring lasers

  • E. Ntongwe Mesumbe
  • Alain M. DikandéEmail author
Article
  • 71 Downloads

Abstract

A model of orthogonally polarized two-field fiber ring laser with a linear gain is considered, with emphasis on the continuous-wave stability and the existence of soliton trains. The continuous-wave stability analysis is carried out within the framework of the modulational-instability approach, the variations of the gain spectrum with the modulation frequency and characteristic parameters of the model give rise to a rich variety of stability features including single-band and multiband stability regions. Seeking for pulse structures of the model, the two coupled cubic complex Ginzburg–Landau equations describing individual mode propagations are transformed into a set of coupled, first-order nonlinear ordinary-differential equations for the amplitudes and phases of the two modes. Numerical simulations of the last set of coupled equations indicate that in the anomalous dispersion regime, envelopes of the two fields are periodic trains of pulses the amplitudes of which are affected by the linear gain.

Keywords

Fiber ring laser Orthogonally polarized two-mode fields Modulational instability Pulse trains 

Notes

Acknowledgements

Part of the work of A. M. Dikandé (numerical simulations) was done during a visit at the ICTP Trieste, Italy. The authors thank the anonymous referees for their pertinent suggestions.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Laboratory of Research on Advanced Materials and Nonlinear Science (LaRAMaNS), Department of Physics, Faculty of ScienceUniversity of BueaBueaCameroon

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