HY-21-AM-1550Pxx series 1550nm erbium-doped fiber amplifier adopts low-noise pumping laser、high-quality erbium-doped fiber and advanced microcomputer real-time monitoring circuits to ensure excellent performance. It is an optical repeater device that is used to boost the intensity of optical signals being carried through a fiber optic communications system. Main features  Adopts the latest 980nm﹑1480nm double-pumping laser technology for higher output optical power.  Owned pumping light source and high-quality erbium-doped fiber to insure low noise, high efficiency of energy conversion.  Perfect microprocessor automatic monitoring circuitry can monitor the operating status real-timely and precisely  Front panel displays status and alarm.  With standard RS-232 interface and Ethernet RJ45 interface, remote monitor conveniently.