Comparison with state-of-the-art systems (IMAGE) ETH Zurich Department of Physics Caption (a) State-of-the-art high-repetition-rate (>10 kHz) mid-infrared systems. (b) State-of-the-art phase-matched high-harmonic cut-offs at high repetition rates. (Reference points were compiled in October 2019, at the date of submission.) Credit ETH Zurich/D-PHYS Keller group Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.