... coupled 1550nm /1490nm /1310nm out FTTH,FTTB High-Power Fiber Amplifier,YEDFA FWAP-1550HA Series,PON+CATV EDFA ... relatively mature, so widely used. Erbium-doped fiber is the core components of the EDFA, it ... makes quartz optical fiber as matrix material, and incorporate a certain ... pump light is injected into the erbium-doped fiber, Er3 + have been excited from the low ...