Hannover 2016 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 37: Advanced Concepts for High Peak Power Ultrafast Lasers I
A 37.4: Hauptvortrag
Freitag, 4. März 2016, 12:50–13:20, e415
High-intensity few-cycle pulses with ultrahigh temporal contrast — •Stefan Karsch1,2, Alexander Kessel1, Christoph Skrobol1, Mathias Krüger1, Christoph Wandt1, Sandro Klingebiel1, Olga Lysov1, Izhar Ahmad1, Sergei Trushin1, Vyacheslav Leshchenko1, Zsuzsanna Major1,2, and Ferenc Krausz1,2 — 1Max-Planck-Institut für Quantenoptik — 2Ludwig-Maximilians-Universität München
Increasing the single-shot photon flux of attosecond XUV-pulses by surface harmonic generation calls for novel few-cycle laser sources: Here, the XUV radiation is generated by reflecting a few-cycle pulse from a relativistically oscillating plasma surface driven by the pulse itself.This requires few-cycle light pulses with intensities well above 1019 W/cm2 and a temporal contrast that prevents target expansion before the arrival of the main pulse.
The Petawatt Field Synthesizer (PFS) project at the MPQ follows a novel approach to generate energetic, ultrabroadband light pulses with unprecedented temporal contrast. By employing a chain of optical paramtetric amplifiers pumped by 1-ps green laser pulses from a purpose-built, diode-pumped high-energy CPA laser we ensure that no premature light can reach the target outside the 1-ps pumping window. The high-contrast requirements also call for a high-energy, temporally clean octave-bandwidth seed in the 700-1400 nm range.
We report on the status of the three project branches, namely the seed generation and optical synchronization, the pump laser development and finally the OPA amplification and dispersion control.