Abstract
PEARL laser facility was the first PW-class laser based on OPCPA, in which a peak power of 0.56 PW was achieved back in 2007 [1]. Since then, this facility has been actively used for studies in the field of laser physics and laser-matter interaction. Now, this facility is under upgrade. The Compression after Compressor Approach (CafCA) for additional nonlinear pulse compression [2], installation of a deformable mirror for a focal spot improvement [3] and pump laser optimization were implemented on PEARL facility. The main drawback of the PEARL laser setup is the instability of the electrical synchronization between the fs signal and pump pulses. But, both laser-matter interaction and implementation of CafCA and deformable mirror requires improving of pulse-to-pulse stability of PEARL laser.
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