title: Design of PETAL multipetawatt high-energy laser front end based on optical parametric chirped pulse amplification.
abstract: We report on a single shot optical parametric chirped pulse amplifier designed to seed the Petawatt Aquitaine Laser on the Laser Integration Line facility multipetawatt high-energy laser. The scheme is based on a stretched signal pulse at 1053 nm amplified with 20% conversion efficiency by a monomode pump pulse at 527 nm. The homemade pump laser is able to deliver a single shot beam with a square flat top spatial profile and programmable temporal shape. A high-stability 150 mJ, 8 nm, and 4.5 ns stretched pulse is then obtained with an excellent quality spatially shaped beam.
authors.affiliation: Commissariat à l'Energie atomique, Centre d'Etudes Scientifiques et Techniques d'Aquitaine, BP2, 33114 Le Barp, France. emmanuel.hugonnot@cea.fr
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Hugonnot
authors.forename: Gérard
authors.initials: G
authors.lastname: Deschaseaux
authors.forename: Olivier
authors.initials: O
authors.lastname: Hartmann
authors.forename: Hervé
authors.initials: H
authors.lastname: Coïc