WE-1550-YL-JD optical amplifier uses well-known high-performance erbium-ytterbium co-doped double-clad fiber and low-noise pump laser. It has a reliable circuit design and efficient heat dissipation design. This device adopts a modular design internally and it has high integration. Ultra wide input optical power range, 1RU 19 "height, compatible with EIA racks. The entire machine built-in CWDM can support 32 outputs. It provides SNMP protocol network management software and WEB network management, suitable for amplified transmission of downstream 1550nm optical signal in FTTH network.