Erbium-Doped Fiber Amplifiers At AT&T Bell Labs: A Paced Odyssey By Emmanuel Desurvire Foreward by Josè Chesnoy May 21, 2018 Foreward Three inventions have made possible the advent of long-haul optical communications: fused-silica fibers, semiconductor lasers, and last but none the least, Erbium Doped Fiber Amplifier (EDFA). The EDFA is one of the most revolutionary [...]