Power scaling of LED-pumped alexandrite: The road to high gain multipass amplifiers Elio Thellier, Hussein Taleb, Catherine Le Blanc, Pierre Pichon, Frédéric Druon, Patrick Georges and François Balembois EPJ Web Conf., 307 (2024) 04029 Published online: 18 October 2024 DOI: 10.1051/epjconf/202430704029