Verrillon® Erbium Doped Fibers (EDF) from AFL is a high NA single-mode, highly doped with erbium and optimized for 980nm pumping in erbium-doped fiber amplifiers (EDFA). The high erbium content in this fiber allows for high efficiency and short device length, while the high NA allows for tight bend radii in compact EDFA packaging. The VSS200-EDF Series has been widely incorporated in EDFAs in the telecommunications industry over the last two decades.