Amplification Paramétrique Dans Les Fibres Optiques
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Cette thèse porte sur l'utilisation du processus d'amplification paramétrique dans le fibres optiques dans le cadre d'applications en télécommunications (collaboration avec Alcatel) et sur la génération de supercontinuum spectraux. Les Amplificateurs Paramétriques à Fibres Optiques (FOPA) possèdent un potentiel intéressant en vue d'applications en télécommunications, en raison des larges bandes de gain disponibles, de leur accordabilité en longueur d'onde et de leurs propriétés de conversion de fréquence. Nous proposons un travail principalement théorique afin de vérifier la compatibilité de cette nouvelle famille d'amplificateurs avec les performances que requièrent les systèmes de télécommunications actuels. Différents formats de modulation de phase de la pompe sont étudiés afin de s'affranchir de la diffusion Brillouin stimulée, susceptible d'ètre engendrée par les puissantes pompes continues mises en oeuvre dans ces amplificateurs. Les performances de ces pompes sont ensuite évaluées sur des signaux monochromatiques et sur des signaux modulés en intensités. Ces résultats théoriques ont été validés par des des essais expérimentaux réalisés par Alcatel.
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