Performance Benefits of 1860 nm vs. 1940 nm Pumping of Holmium-doped Fibres with Significant Ion Pairing June 16, 2022 Robert E. Tench, Wiktor Walasik, Alexander Amavigan, and Jean-Marc Delavaux, Proceedings of ECOC 2021 Conference (Bordeaux, France), Paper Tu2A-2, Sept. 2021. Posted in Publications