The Role of EDFA in Optical Fiber Communication
EDFA, short for Erbium Doped Fiber Amplifier, is an optical amplifier, of which the core is doped with the rare-earth element Erbium. By using the Erbium ions to higher energy levels, we can achieve amplification of signals at 1550 nm and allow high bit-rate transmission over long distance. EDFA provides a new life to optical fiber transmission as it efficiently makes up the signal attenuation during the long-haul transmission. A sample of EDFA Optical Amplifier is shown below.
At the heart of EDFA technology is the Erbium Doped Fiber (EDF), which is a conventional Silica fiber doped with Erbium. When this Erbium doped fiber is pumped with a laser of an appropriate wavelength. The erbium ions is excited to a long lifetime intermediate state. And when the photons belonging to the signal at a different wavelength from the pump light meet the excited erbium atoms, the erbium atoms gives up some of their energy to the signal and return to their lower-energy state. All the energies that erbium gives up are in the form of additional photons which are exactly in the same phrase and direction resulting in the signal amplification.
EDFA is widely used in SDH frame inside, CATV machine box, optical amplifier system for its small volume, low power consumption, and superior performance. DWDM EDFA will be explained in the following passage.
Through the above explanation, EDFA is by far the most advanced optical amplifiers. Optical amplifiers provided by Fiberstore are designed for all network segments (access, metro, regional and long haul) and applications (telecom, cable and enterprise). We have a serial of EDFA optical amplifiers, including DWDM EDFA, CATV EDFA and SDH EDFA. We can satisfy all your needs here, please feel free to contact us.