Contribution à l’étude théorique et expérimentale d’un oscillateur laser fonctionnant en régime impulsionnel dans les bandes spectrales C et L

Abstract : This work deals with the development of a fiber laser generating high energy and width tunable square pulses and high-energy giant pulses. First, we have developed a numerical model to study the generation of rectangular pulses in a double amplifier fiber laser. The objective is to study the impact of the non-linear effect induced by the microstructured optical fiber on the control of the square pulse duration. A set of laser parameters allowed us to generate high energy square pulses in the dissipative soliton resonance (DSR) regime. In addition, several experiments have been set up to optimize the generation of the DSR pulse in terms of energy and duration. Experimentally, high energy giant pulses from a passively mode-locked fiber ring laser coupled to a long external cavity are obtained. This allowed us to generate a wide range of pulse duration of μs at a low repetition rate in cavities using artificial saturable absorbers.
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Fatma Ben Braham. Contribution à l’étude théorique et expérimentale d’un oscillateur laser fonctionnant en régime impulsionnel dans les bandes spectrales C et L. Optique [physics.optics]. Université d'Angers; École nationale d'ingénieurs de Tunis (Tunisie), 2018. Français. ⟨NNT : 2018ANGE0025⟩. ⟨tel-02188222⟩

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