CATV EDFA is an important Optical Relay Transmission equipment of 1550nm Optical Fiber Communication system. It is mainly used on long distance Optical Fiber Transmission of television Image signal, Digital Transmission System, Telephone Voice Signal Data Signal. Low noise pump laser of famous brand, import high performance. Erbium-doped fiber, perfect and micro-computer Automatic Controlled System are built in the series to ensure the excellent performance.