Laser properties of hexagonal Yb-doped fluorapatite (FAP) transparent ceramics Kazuya Takimoto, Hiroyasu Sone, Shinki Nakamura and Hiroaki Furuse EPJ Web Conf., 307 (2024) 04011 Published online: 18 October 2024 DOI: 10.1051/epjconf/202430704011