Numerical model of an Er3+/Yb3+ co-doped seven-core fiber amplifier for a space division multiplexing system.

Space division multiplexing (SDM) erbium-doped seven-core fiber amplifiers (EDFAs) are increasingly attracting interest due to their performances in improving capacity transmission systems. To increase the gain and improve the characteristics of the SDM seven-core fiber amplifier, this paper proposes the use of the erbium/ytterbium (Er3+/Yb3+) co-doped seven-core fiber amplifier. A theoretical model of the SDM co-doped seven-core fiber amplifier is developed. The presented results show that the proposed model allows us to obtain a peak gain over 60 dB at a wavelength of 1543 nm, a large bandwidth of 64 nm with a gain greater than 20 dB and with a minimum noise which is lower than 6 dB.