Compact 200 kHz HHG source driven by a few-cycle OPCPA

We present a compact HHG source driven by a few-cycle, few μJ, 200 kHz OPCPA system. Efficient harmonics are generated from Neon, Argon and Krypton with conversion efficiency of 4.0×10−8, 1.2×10−6 and 4.1×10−6, respectively.