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, Pour résoudre ce problème, l'approche la plus couramment proposée consiste à coller un empilement InP sur une plaque SOI afin de fabriquer un laser hybride III Cependant, aucune des démonstrations n'a été réalisée avec un empilement d'interconnexions métalliques BEOL (Back-End Of Line) standard, empêchant ainsi une intégration électronique-photonique appropriée. Pour résoudre le problème topographique posé par cet ajout de couches, un nouveau schéma d'intégration, appelé intégration Back- Side, a été développé et est présenté dans ce document. Tout d'abord, le contexte de cette étude, un état de l'art ainsi que la présentation du Back-Side est abordé. La nouveauté apportée par cette intégration, à savoir le collage du III-V sur la face arrière du SOI après la structuration de celui-ci, y est alors détaillé, Bien que ces plateformes diffèrent à bien des égards, elles manquent toutes d'une source de lumière intégrée Le bon fonctionnement d'un élément essentiel à la puce photonique, le réseau de couplage, est ensuite abordé à travers des simulations, sa fabrication et des caractérisations optiques. Nous avons prouvé que, sous certaines conditions, ce dispositif possède les mêmes performances mesurées en Back-Side qu'en Front-Side
, Afin d'augmenter le confinement du mode dans le MQWs (Multi Quantum Wells) et donc d'assurer un gain optique élevé, le mode optique est progressivement transféré entre le guide III-V et le guide silicium du laser hybride par des épanouisseurs adiabatiques, structurés dans le SOI de part et d'autre de la zone de gain, pour être enfin réfléchi par les miroirs DBR dans le silicium. Enfin, son processus de fabrication est explicité avant que ses caractérisations opto-électroniques ne soient finalement présentées. Les lasers à pompage électrique ont été testés dans des conditions de courant continu et la lumière générée a été collectée à travers un réseau de couplage par une fibre optique externe multimode. Les pertes de couplage ont été mesurées supérieures à 10 dB
, La tension de seuil est de 1,45 V. Les spectres lasers reflètent un fonctionnement mono-fréquence, pour différents courants d'injection, avec une longueur d'onde centrale correspondant à la longueur d'onde de Bragg des miroirs. Un SMSR (Side Mode Suppression Ratio) de plus de 35 dB a été mesuré, ce qui prouve la bonne pureté spectrale de ce laser