High-energy, few-cycle, kHz OPCPA at 2.1 μm pumped by a picosecond cryogenic Yb:YAG laser

摘要

We report on a kHz, mJ-level, ultrabroadband, phase-stable 2.1-μm OPCPA for high-flux water-window high-order harmonic generation. The final stage is pumped by a high-energy, 15-ps cryogenic Yb:YAG CPA laser optically synchronized to the signal.