Divided-pulse amplification for terawatt-class fiber lasers T. Eidam, M. Kienel, A. Klenke, J. Limpert and A. Tünnermann Eur. Phys. J. Special Topics, 224 13 (2015) 2567-2571 Published online: 26 October 2015 DOI: 10.1140/epjst/e2015-02566-8