DWDM EDFA module integrates electric drive, temperature control, remote control, and alarm circuits all together in a small package. The EDFA has input and output power monitors, amplifier working condition monitor. It can be set at three different working modes: constant gain, constant output power or constant pump power. The EDFA has assembled up to three pump lasers, which increases the output power and achieve the pump failure protection. The EDFA is designed as C-band (1528 to 1603 nm) or L-band (1570 to 1604 nm) to be used in DWDM communication systems.