Optical fiber amplifier (English abbreviation: Optical Fiber Ampler, abbreviated OFA) 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 relay amplification, preamplification and power amplification. Compared with the traditional semiconductor laser amplifier (SOA), OFA does not need to undergo complex processes such as photoelectric conversion, electro-optical conversion and signal regeneration, and can directly perform full-light amplification of the signal, which has good "transparency" and is especially suitable for long-distance transmission. 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 incorporate a rare earth element capable of generating laser light in the core of the optical fiber, and the direct light excitation provided by the laser is used to amplify the transmitted optical signal.

The traditional optical fiber transmission system uses an optical-electric-optical regenerative repeater. This relay device affects the stability and reliability of the system. To remove the above conversion process, the signal is amplified and transmitted directly on the optical path. An all-optical transmission type repeater replaces this regenerative repeater. Suitable devices are erbium doped fiber amplifiers (EDFA), erbium doped fiber amplifiers (PDFA), and erbium doped fiber amplifiers (NDFA). At present, optical amplification technology mainly uses EDFA.

Optical Fiber Ampler (optical fiber Ampler), an optical device that can amplify optical signals. According to its position and function in the optical fiber line, it is generally divided into relay amplification, preamplification and power amplification.

The EDFA-PY-C series of erbium-doped fiber amplifiers are high-gain, low-noise fiber amplifiers used to preamplify weak signals, improve receiver sensitivity, and extend signal transmission distance. The EDFA-PY-C series amplifiers use an optimized erbium-doped fiber laser path and a 980 nm single-mode pump laser for high-performance small-signal amplification.

Built-in drive circuit and logic control circuit, real-time monitoring of key information such as input/output optical power, pump laser temperature, module temperature and signal gain, based on advanced microprocessor control system, combined with high-precision ATC and ACC control circuits The system structure is highly stable, and at the same time ensures the quick and intuitive operation of the light source.