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.