Broadband picosecond-pumped OPCPA delivering 5 TW, sub-7 fs pulses with excellent temporal contrast

Summary form only given. The Petawatt Field Synthesizer (PFS) under construction at the Max-Planck Institute for Quantum Optics is an optical parametric chirped pulse amplification (OPCPA) system designed to generate few-cycle pulses with petawatt-scale peak power [1, 2]. Such pulses are of high interest for laser-matter interaction experiments, for example for the generation of isolated attosecond pulses with unprecedented efficiency [3]. Here we report on the current performance and upgrade plans of the OPCPA chain of PFS.