Multi-mode optical fiber amplifier supporting over 10 spatial modes. - Nicolas K. Fontaine; Bin Huang; Zeinab Sanjabi Eznaveh; Haoshuo Chen; Cang Jin; Burcu Ercan; Amado Velaquez-Benitez; S. H. Chang; Roland Ryf; Axel Schülzgen; Juan Carlos Alvarado-Zaharias; Pierre Sillard; et al. (OFC, 2016)