Sébastien Laux

Suppression of parasitic lasing in high energy, high repetition rate Ti:sapphire laser amplifiers

Transverse parasitic lasing is well known for limiting the signal gain and the pulse energy that can be extracted from Ti:sapphire petawatt amplifiers. We have developed a technique for suppressing these parasitic lasing modes based on perfect refractive index-matching liquid doped with a broad-bandwidth absorber to suppress the transverse lasing while ensuring proper heat removal from the Ti:sapphire crystal. The 800 nm laser output with a bandwidth of 41 nm (FWHM) and peak energy of 22.7 J at a repetition rate of 1 Hz is demonstrated.

Latest results of 10 petawatt laser beamline for ELi nuclear physics infrastructure

A laser system made of two beams of 10 PW each has been designed and is currently built for ELI-NP research infrastructure. Design is presented as well as preliminary results up to the 1PW level amplifier.

High-energy 1 Hz titanium sapphire amplifier for PetaWatt class lasers

We have obtained 23 J uncompressed laser pulses at a repetition rate of 1 Hz with a spectral width of 41 nm FWHM which could produce 600 TW if compressed ; this is the highest energy obtained to date from a Titanium Sapphire amplifier working at a such repetition rate. This amplifier is part of a 1.3 PW laser system under construction by Thales Optronique for the BELLA project of LBNL aiming laser wakefield acceleration of electrons up to 10 GeV.

High contrast broadband seeder for multi-PW laser system

A hybrid Ti:Sa CPA/BBO OPCPA system with a XPW filter in between the two has been developed to produce a broadband high contrast seeder of 10 mJ for the two 10 PetaWatt beamlines of ELI NP infrastructure.

High energy pump laser for multi-petawatts laser

ATLAS 100, a compact high energy laser delivering more than 100 joules at the repetition rate of 1 shot per minute has been developed for the two 10 PetaWatt beamlines of ELI NP infrastructure.

First sub-25fs PetaWatt laser system

We describe a Titanium:Sapphire based PetaWatt laser providing an unprecedented pulse width of 23.7 fs at a repetition rate of 0.1 Hz. Energy and pulse duration measurements demonstrate a potential peak power of 1.12 PW

First sub-25 fs PetaWatt laser system

We describe the design and performance of a PW laser based on Ti:Sa operating at an unprecedented pulse width of 23.7 fs at a repetition rate of 0.1 Hz. Energy and pulse duration measurements demonstrate a potential peak power of 1.12 PW

1Hz PetaWatt Class Laser for Laser Driven Wakefield Acceleration

We present a two stages Ti:Sapphire amplifier system running at 1Hz reaching up to 65J supporting sub-30fs pulses. Extreme care have been taken on the beam profile quality as well as preventing transverse lasing.