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Theses

Contrôle de la phase d'un réseau résonnant pour la mise en forme temporelle d'impulsions laser ultra-brèves

Abstract : The work presented in this thesis deals with two areas of Optics studied at the Hubert Curien laboratory. The aim of this work is to design a zero order resonant grating to perform temporal pulse shaping.
A spectral modulation is usually induced to temporally shape ultrashort laser pulses. However it is known that resonant reflection from a corrugated slab waveguide exhibits sudden changes in the incident light spectrum, especially in its phase. To glance at the influence of a resonant grating on the temporal shape of an ultrashort laser pulse, it is necessary to study spectral response of such a component. This is achieved considering the phenomenological coupled-modes approach. Then a mirror is added under the resonant grating to obtain a pure spectral phase modulator. The induced phase is given by the resonant phenomena and its profile is fixed by the opto-geometrical parameters of the resonant mirror. Nevertheless this limitation can be overcome by re-injecting the reflected beam several times into the grating. Such a set-up permits to induce several phase functions thus several temporal pulse shapes, and particularly double pulses with accordable delay. A resonant mirror was fabricated. Experimental demonstration successfully showed the doubling effect of the optical element on a femtosecond laser pulse.
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https://tel.archives-ouvertes.fr/tel-00366048
Contributor : David Pietroy <>
Submitted on : Thursday, March 5, 2009 - 3:34:09 PM
Last modification on : Monday, January 13, 2020 - 5:46:03 PM
Long-term archiving on: : Tuesday, June 8, 2010 - 8:31:31 PM

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  • HAL Id : tel-00366048, version 1

Citation

David Pietroy. Contrôle de la phase d'un réseau résonnant pour la mise en forme temporelle d'impulsions laser ultra-brèves. Physique [physics]. Université Jean Monnet - Saint-Etienne, 2007. Français. ⟨tel-00366048⟩

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