Développement de traitements multidiélectriques pour les lasers de haute puissance à impulsions femtosecondes

Adrien Hervy 1, 2, 3
Abstract : The peak power handling capability of ultra-short pulse lasers is a main concern for new facilities, like those for the European ELI project (Extreme Light Infrastructure) which aims at providing worldwide scientists the possibility to study matter at unexplored energetic levels. In these last generation laser systems, the characteristics of the beam become extreme as it get closer to the experimental chamber: diameter enlarged to a tenth of centimeters, duration reduced to a few femtoseconds, energy amplified up to hundred joules, etc. The last components of the laser chain require very tight optical performances with the highest laser-induced damage threshold in order to durably propagate the beam while keeping its properties (intensity, spectrum, duration, wave front, etc). Some of these components, like mirrors, are designed from dielectric materials deposited with evaporative process under vacuum. This work is a study of the laser resistance of thin film materials in order to design and manufacture mirrors compatibles with the propagation of high peak power laser beams.
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Adrien Hervy. Développement de traitements multidiélectriques pour les lasers de haute puissance à impulsions femtosecondes. Optique [physics.optics]. Ecole polytechnique, Palaiseau, France, 2015. Français. ⟨tel-01396052⟩

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