Bismuth-gallium-aluminum Co-doped High Concentration Erbium Doped Fiber and Amplifier

Bismuth-gallium-aluminum co-doped high concentration erbium doped fiber(EDF) is fabricated.The absorption coefficient of this fiber at wavelength of 1 530 nm reaches 28.5 dB/m.C band and L band erbium doped fiber amplifiers(EDFAs) are made by this high concentration EDF.The fluorescence spectrum and gain characteristics of these two EDFAs are measured.C band EDFA only uses 2.5 m of this EDF,and which realize high gain.L band EDFA uses 10 m of this EDF,and which achieves effective amplification of L band.