High-bit-rate soliton transmission using distributed amplification and dispersion management

We show through numerical simulations that the use of distributed amplifica tion together with dispersion management can permit single-channel speeds o f 40 Gb/s over transoceanic distances while maintaining 100-km spacing betw een pumping stations. We achieve this performance by using a bidirectional pumping scheme and optimizing the dopant density such that the peak-power v ariations over each fiber span remain below 0.4 dB, The required pump power is less than 80 mW for a dopant density of 200 ions/mu m(3).