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Suppression over a high dynamic range of ase at the rising edge of ultra-intense femtosecond pulses

Objective

Objectives:
The recent progresses in lasers with ultra-high-intensity pulses are now hindered by a strong limiting factor linked to imperfections in the pulse temporal profile. Innovative physics experiments at relativistic intensities that probe new domains such as particle acceleration or laser assisted nuclear physics are inaccessible due to the high level of amplified spontaneous Emission (ASE) pedestals and pre-pulses. The objectives of this program are to develop new techniques devoted to obtain temporal contrast suitable with interaction in a regime of intensity higher than 1020 W/cm2. Reduction of the ASE level with respect to the femtosecond pulse will be obtained by non-linear effects.

Different ways will be investigated through this RTD program, corresponding with associated work packages: Moreover measurement techniques over high dynamic range will be improved. Non linear cleaning and filtering processes like non-linear cleaning by saturable absorber or non linear interferometer, second harmonic generation, or plasma mirrors will be studied. OPCPA techniques need to be fully characterized in term of contrast improvement, such as excimer amplification usable after seeding by frequency converted pulses. In the first 12 months of the project, partners have successfully designed, bought, built, and implemented: · New high order cross-correlators and UV correlators improving the measurement dynamics. (WP1 tasks 1.1, 1.3, 1.4) · New high energy, high contrast oscillators (WP2 task 2.1) · New schemes of non linear filtering at millijoule level (WP2 task 2.3) · Promising technique using plasma mirrors (WP2 task 2.4) · New designs of excimer amplification in XeF (WP3 task 3.1) · Measurements of ASE contrast properties in Optical Parametric Chirped Pulses Amplification process (OPCPA) (WP4 task 4.2).

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
Address
Batterie De L'yvette, Chemin De La Hunière
91120 Palaiseau
France

Participants (8)

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
France
Address
Route De Saclay
91128 Palaiseau
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
France
Address
Campus De Luminy
13288 Marseille
COUNCIL FOR THE CENTRAL LABORATORY OF THE RESEARCH COUNCILS
United Kingdom
Address

OX11 0QX Didcot,harwell,chilton
FORSCHUNGSVERBUND BERLIN E.V.
Germany
Address
Max-born-strasse 2A
12489 Berlin
FOUNDATION OF RESEARCH AND TECHNOLOGY - HELLAS
Greece
Address
Vasilika Vouton
71110 Iraklion
LUND UNIVERSITY
Sweden
Address
Professorsgatan 1
221 00 Lund
MAX-PLANCK-GESELLSCHAFT ZUR FOERDERUNG DER WISSENSCHAFTEN E.V.
Germany
Address
10,Hans-kofermann - Strasse 1
85748 Garching
TECHNICAL UNIVERSITY OF CRETE
Greece
Address
Kounoupidiana Campus
73130 Chania - Crete