33 W OPCPA at 10 kHz repetition rate with four cycle pulse duration at 2.1µm based on a single pump laserAnke Heilmann, Martin Bock, Lutz Ehrentraut, Stefan Eisebitt and Matthias SchnürerEPJ Web Conf., 243 (2020) 10002DOI: https://doi.org/10.1051/epjconf/202024310002