Ziguan L Band power Erbium-doped fiber amplifier is a high saturation output power fiber amplifier (Booster-EDFA). It is used to amplify the signal at the transmitting end, improve the optical power at the transmitting end, and improve the transmission distance of the signal. The series amplifier adopts an optimized optical path structure and a carrier-grade 980nm/1480nm pump laser to achieve high saturation power amplification output. Based on the stable and efficient internal control system, combined with high-precision ATC and ACC(APC) control circuit, to achieve stable and reliable operation of the amplifier. All state parameters and configuration information of the product can be remotely monitored and configured by the host computer. The series of fiber amplifiers has a variety of package forms to meet the requirements of different applications.