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Laser à solitons et vortex localisés

Abstract : In this thesis, I address the formation of localized structures in a semiconductor lasing system based on two mutually coupled microresonators, one playing the role of an amplifier while the second behaves as saturable absorber. I report on the generation and control of independent laser solitons which are bright intensity peaks over an homogeneous low intensity background forming in the transverse section of the laser resonator. At difference with cavity solitons generated in nonlinear cavities driven by an external beam, laser solitons form in a laser system where no external injection of an electromagnetic field is required, thus preserving the phase symmetry. I have analyzed the bifurcation diagram of laser solitons, showing how clusters form by a sequence of bifurcations where the number of peaks of the structures is progressively increased. This is the first analysis of localized structures properties and bifurcation diagram in a phase invariant optical system. Finally, I report on the experimental observation of ring-like localized structures showing a phase defect in their core. These structures have never been experimentally observed, though they have been theoretically predicted in laser with saturable absorber and called localized vortices. Possible applications of laser solitons and localized vortices are also discussed.
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Contributor : Patrice Genevet <>
Submitted on : Wednesday, November 25, 2009 - 4:01:41 PM
Last modification on : Monday, October 12, 2020 - 10:27:27 AM
Long-term archiving on: : Tuesday, October 16, 2012 - 2:50:58 PM


  • HAL Id : tel-00435984, version 1



Patrice Genevet. Laser à solitons et vortex localisés. Physique [physics]. Université Nice Sophia Antipolis, 2009. Français. ⟨tel-00435984⟩



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