Stack and dump: Peak-power scaling by coherent pulse addition in passive cavitiesS. Breitkopf, T. Eidam, A. Klenke, H. Carstens, S. Holzberger, E. Fill, T. Schreiber, F. Krausz, A. Tünnermann, I. Pupeza and J. LimpertEur. Phys. J. Special Topics, 224 13 (2015) 2573-2577DOI: https://doi.org/10.1140/epjst/e2015-02567-7