EDFA (Erbium-Doped Fiber Amplifier) optical amplifier card developed by GIGALIGHT is specifically designed for long-distance digital optical fiber communication systems in conjunction with dispersion equipment. It features a highly reliable pump laser as its core component and incorporates unique ATC (Automatic Temperature Control) and ACC (Constant Pump Current Control) circuits, ensuring high stability and reliability of output power. With a professionally designed GFF (Gain Flattening Filter) and excellent optical path design, it achieves optimal flatness and noise performance. It supports APC (Automatic Power Control) and AGC (Automatic Gain Control) functions.