Robust optimization of the laser induced damage threshold of dielectric mirrors for high power lasers

Marine Chorel (1) , Thomas Lanternier (1) , Eric Lavastre (1) , Nicolas Bonod (2) , Bruno Bousquet (3) , Jérôme Néauport (1)

1 CESTA - Centre d'études scientifiques et techniques d'Aquitaine
2 CLARTE - CLARTE
3 CELIA - Centre d'Etudes Lasers Intenses et Applications

We report on a numerical optimization of the laser induced damage threshold of multi-dielectric high reflection mirrors in the sub-picosecond regime. We highlight the interplay between the electric field distribution, refractive index and intrinsic laser induced damage threshold of the materials on the overall laser induced damage threshold (LIDT) of the multilayer. We describe an optimization method of the multilayer that minimizes the field enhancement in high refractive index materials while preserving a near perfect reflectivity. This method yields a significant improvement of the damage resistance since a maximum increase of 40% can be achieved on the overall LIDT of the multilayer.Present states and future prospect of fast ignition realization experiment (firex) with gekko and lfex lasers at ile," Nucl. Instrum. Methods Phys. Res. A 653(1),

Domaines: Sciences de l'ingénieur [physics]; Optique / photonique

Marine Chorel, Thomas Lanternier, Eric Lavastre, Nicolas Bonod, Bruno Bousquet, et al.. Robust optimization of the laser induced damage threshold of dielectric mirrors for high power lasers. Optics Express, 2018, 26 (9), ⟨10.1364/OE.26.011764⟩. ⟨hal-01912308⟩