1  kHz, 12  mJ, 15  fs, supercontinuum-seeded OPCPA laser as an auxiliary beam for pump-probe experiments

The femtosecond synchronization project (FSYNC) at ELI-Beamlines in Czechia aims to improve experiments with the L1-Allegra laser (up to 50 mJ at 1 kHz, 15 fs pulse duration) by providing another beamline that can run in two configurations-either independently, allowing two experiments to run in parallel, or in an arbitrary delay pump-probe configuration. The FSYNC laser (12 mJ at 1 kHz, <15<i>f</i><i>s</i> pulse duration) consists of a frequency-stabilized oscillator, a fiber seed distribution system, a dual-output pump laser with a pulse separator and grating compressor, a picosecond supercontinuum seed, four stages of optical parametric chirped pulse amplification, and a chirped mirror compressor.