|
|||||
|
|
Temporal contrast control at the PHELIX petawatt laser facility by means of tunable sub-picosecond optical parametric amplification |
|
| Authors: | F Wagner C P João J Fils T Gottschall J Hein J Körner J Limpert M Roth T Stöhlker V Bagnoud |
| Institution: | 1. Inst. für Kernphysik, Technische Universit?t Darmstadt, Schlossgartenstr. 9, 64289, Darmstadt, Germany 2. GoLP, Instituto de Plasmas e Fusao Nuclear-Laboratorio Associado, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001, Lisbon, Portugal 3. GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, 64291, Darmstadt, Germany 4. Institute of Applied Physics, Friedrich-Schiller-Universit?t Jena, Albert-Einstein-Str. 15, 07745, Jena, Germany 5. Inst. für Optik und Quantenelektronik, Friedrich-Schiller-Universit?t Jena, Max-Wien-Platz 1, 07743, Jena, Germany 6. Helmholtz-Institut Jena, Fr?belstieg 3, 07743, Jena, Germany |
| Abstract: | We report on the development of a preamplifier module for temporal contrast enhancement and control at petawatt-class lasers. The module is based on an ultrafast optical parametric amplifier (uOPA), which produces temporally clean pulses at the 60 μJ level for seeding a chirped pulse amplification (CPA) system, namely the petawatt facility PHELIX. The amplifier module allows for gain reduction in the following amplifiers, resulting in an attenuation of amplified spontaneous emission (ASE) by more than 4 orders of magnitude. Since the ASE of a CPA system linearly depends on the seeding energy, we were able to demonstrate a continuous variation of the temporal contrast by tuning the gain of the uOPA. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |