HY-21-AM04PxX 1550nm ytterbium-doped fiber amplifier is equipped with stable optical output power circuit and pump laser thermoelectric cooling device Temperature stability control circuit to ensure the best performance of the equipment and long-life laser stability. The microprocessor software monitors the lasers’ working state, the Digital Panel displays the operating parameters. With professional heat dissipation structure design, intelligent temperature control fan and low power consumption make it to be the ideal choice for building the 1550nm large and medium-sized optical transmission network.