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Manipulation des propriétés de cohérence spatio-temporelle de la lumière par mélange à deux ondes opto-numérique

Abstract : Propagation of optical signals through multimode scattering media is a very fundamental problem in physics. Many studies have been conducted in order to find efficient methods for the reconstruction of information from a scrambled content. Applications range from telecommunication information retrievement to biological endoscopy. In these goals, various approaches have been developed in the past few years. Some are based on two-wave mixing interaction in photorefractive crystals, others use light valves or numerical holography based on a spatial light modulator.During my PhD, I designed a new method for the study of spatio-temporal properties of optical information that has been scrambled through a multimode medium. This method relies on a digitally assisted two-wave mixing interaction based on a camera - Spatial light modulator combination. This study ensues from signal manipulation with a photorefractive crystal experiment. Besides, experimental parameters are not limited by the intrinsic properties of a crystal and allows much more flexibility on the light manipulation.
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Aliénor de la Gorce. Manipulation des propriétés de cohérence spatio-temporelle de la lumière par mélange à deux ondes opto-numérique. Optique [physics.optics]. Université Paris-Saclay, 2020. Français. ⟨NNT : 2020UPASO004⟩. ⟨tel-03179767⟩

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