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Technological development of the erbium doped fibers for L-band

We report on the erbium doped low numerical aperture (NA) fibers for L-band EDFA, obtained in the Laboratory of Optical Fibres Technology, Marie Curie Sklodowska University. The gain and noise properties of doped fibers were investigated by a diagnostic system developed in the Laser & Fiber Electronics Group, Institute of Telecommunications and Acoustics, Wroclaw University of Technology. Their basic characteristics are presented, especially in the 1580 nm to 1620 nm spectral range.