Experimental and theoretical investigation of a new kind of feedback in optical cavities, with applications in photonics.

Abstract : Lasers are existing for about a half century. Since then, optical feedback and its related dynamics has been studied extensively. Classical optical feedback is usually phase dependent, implying that the size of the resonator must be controlled with high precision. Recently, we demonstrated that a new kind of optical feedback is possible. This new feedback mechanism is based on nonlinear optical interactions and is not sensitive to the optical phase. A proper understanding of the internal dynamics of optical resonators with gain and feedback was necessary to generate pulses at the output of a laser. It has been demonstrated that the phase-insensitive feedback mechanism (PIFM) can lead to interesting dynamics. In a first time, we propose to verify these predictions experimentally, as well as to extent the existing analytical and numerical results on PIFM. The final goal of this work is to identify new dynamics that could be used in photonics, to generate stable pulse trains, build an optical memory and/or logical gates, and perform replication of data on different frequency channels.
Promoteur/Supervisor : Prof. Kockaert Pascal
Email : Pascal.Kockaert@ulb.ac.be
Site Web/Web site : opera.ulb.ac.be
Centre de recherche/Research center : OPERA-photonique
Faculté/Faculty : Faculté des Sciences appliquées - école polytechnique/Brussels School of Engineering (Faculty of Applied Sciences)
Ecole doctorale/Graduate Colleges : Sciences de l'ingénieur/Engineering
Ecole doctorale thématique/Graduate School (French Only): Méthodes Expérimentales & Théoriques; Atomes, Molécules & supRamolécules PHOtons, Spectres & Electrons

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