Optical fiber amplifier refers to a new type of all-optical amplifier used in optical fiber communication lines to achieve signal amplification. According to its position and function in the optical fiber line, it is generally divided into three types: relay amplification, pre-amplification, and power amplification.
Compared with the traditional semiconductor laser amplifier (SOA), OFA does not need to go through complex processes such as photoelectric conversion, electro-optical conversion, and signal regeneration. It can directly perform all-optical amplification of the signal. It has good "transparency" and is especially suitable for long distances. Relay amplification of optical communication. It can be said that OFA has laid a technical foundation for the realization of all-optical communication.
The fiber amplifier technology is to dope rare earth elements that can generate laser light into the core of the fiber, and amplify the passing optical signal through the direct current light excitation provided by the laser. The traditional optical fiber transmission system uses optical-electrical-optical regenerative repeaters, which affect the stability and reliability of the system. In order to remove the above conversion process and directly amplify and transmit the signal on the optical path, it is necessary to use An all-optical transmission repeater replaces this regenerative repeater. Applicable equipment includes erbium-doped fiber amplifier (EDFA), praseodymium-doped fiber amplifier (PDFA), and niobium-doped fiber amplifier (NDFA). At present, optical amplification technology mainly uses EDFA.
Optical Fiber amplifier, an optical device that can amplify the power of an optical signal. According to its position and function in the optical fiber line, it is generally divided into three types: relay amplification, pre-amplification, and power amplification.
