“High Performance +23 dBm Miniature PM Ho-Doped Fiber Amplifier at 2100 nm,” Alexandre Amavigan, Shivaraman Asoda, Robert E. Tench, Jean-Marc Delavaux, Thierry Robin, Benoit Cadier, and Arnaud Laurent, Proc. SPIE 11665, Fiber Lasers XVIII: Technology and Systems, 1166529 (5 March 2021).