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Réseaux de diffraction à multicouches diélectriques pour la compression d'impulsions petawatt par mosaïques de réseaux.

Abstract : Pulse compression diffraction gratings represent currently an important bottleneck for the development of energetic high-intensity Petawatt laser. Indeed, the laser-induced damage threshold of standard gold-coated gratings and the diffraction efficiency are limited. That's why we have developed a new generation of diffraction gratings: ! multilayer dielectric (MLD) gratings. Studies of MLD g! ratings applied to the Pico2000 laser project are the first part of my thesis work. On the other hand, diffraction gratings for pulse compression need to have meter-scale size. As an alternative of large dimension gratings, we have studied the principle of grating tiling by coherent addition. Tiled grating experiments with an interferometric technique are presented and also the demonstration of multi-Terawatt pulse compression by grating tiling. The last topic concerned the temporal control of Pico2000 laser pulse for the petawatt regime: temporal contrast and spectral pulse shaping.
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Submitted on : Wednesday, July 28, 2010 - 11:12:55 AM
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  • HAL Id : pastel-00002919, version 1

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Arnaud Cotel. Réseaux de diffraction à multicouches diélectriques pour la compression d'impulsions petawatt par mosaïques de réseaux.. Physique [physics]. Ecole Polytechnique X, 2007. Français. ⟨pastel-00002919⟩

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