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Habilitation à diriger des recherches

Solitons de Cavité dans les lasers à semi-conducteurs à Cavité Verticale

Abstract : Cavity Solitons (CS) are stationary bright intensity peaks appearing in the transverse plane of an optical resonator driven by a coherent field (holding beam) and filled by a non linear medium. They can be individually switched on and off by a local perturbation in form of an addressing light pulse. The ability to control their location and their motion by introducing phase or amplitude gradients in the holding beam makes them interesting as mobile pixels for all-optical processing units. From a fundamental point of view CS can be interpreted as single peak Localised Structures as the ones appearing in granular media, gas discharge, chemical reactions and hydrodynamics. These structures appear in presence of a pattern forming instability of the homogeneous solution that appears subcritically, i.e. two or several solutions coexist for the same parameter values. They have therefore a different nature from spatial solitons which are based on compensation between diffraction and non linearity occurring during the propagation.
In this thesis I review the most important results of my research on CS in Vertical Cavity Surface Emitting Lasers. I will introduce them in the general frame of pattern formation in optics, evidencing the similarities with Localised Structures observed in other optical systems.
I will give experimental evidence of their existence and I will characterize their properties in the parameter space. I will show that CS can be arranged in arrays that can be reconfigured optically and I will give a first principles demonstration of an all-optical delay line based on CS drift under the presence of phase gradient in the holding beam.
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Habilitation à diriger des recherches
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Contributor : Massimo Giudici <>
Submitted on : Wednesday, July 2, 2008 - 5:00:26 PM
Last modification on : Wednesday, October 14, 2020 - 4:23:12 AM
Long-term archiving on: : Monday, October 1, 2012 - 10:45:42 AM


  • HAL Id : tel-00292846, version 1



Massimo Giudici. Solitons de Cavité dans les lasers à semi-conducteurs à Cavité Verticale. Physique [physics]. Université Nice Sophia Antipolis, 2008. ⟨tel-00292846⟩



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