Small signal EDFA erbium-doped fiber amplifier is used to amplify weak light signals or as a preamplifier for weak light detection, and is widely used in fiber optic sensing systems and fiber optic communication network systems.
Pulsed EDFA erbium-doped fiber amplifier, C-band, commonly used after the acousto-optic modulator to achieve the amplification of pulsed optical signals, common in distributed fiber optic sensing systems, LIDAR and other applications.
EDFA as a preamplifier for photoelectric detection applications to achieve the amplification of weak light signals can greatly avoid the introduction of noise. After amplification, a PIN-type photodetector is used to realize the photoelectric conversion. The PIN detector is simple in structure, more linear and more adaptable to temperature.