This paper introduces the technologies of remote pumped erbium-dopedopticalfiberamplifier, remote pumped optical fiber pre -amplifier, Raman noise filtering and forward error correction used in G.
The implement applications of erbiumdopedfiberamplifier (EDFA) and fiber Raman amplifier (FRA) make the launching power in optical fiber communications systems increased significantly.
With the WDM (wavelength Division Multiplexing) technology based on EDFA (ErbiumDopedfiberAmplifier) developing, it is possible to use multiple wavelengths to transmit over the same optical fiber.