Application: LAN, CATV System High Speed Transmission System Coherent Optical Communication EDFA (Erbium-Doped Fiber Amplifier) Features: (1) Work wavelength: 1250-1620nm (2) Return Loss: ≥55 dB (UPC) or ≥60 dB (APC) (3) Attenuation accuracy: +-0.5dB (under 10 dB); +-10% (over 10 dB) (4) Attenuation value: 1dB-10dB(1dB step), 15, 20, 25, 30 dB,etc (5) FC, SC, ST, LC types optional (6) Operation temperuate: -40---+75 (7) Storage temperature: -40 ---+85.