Abstract

Experiments on soliton pulse transmission through optical fiber on the distance of up to 10000 km [1] confirm the possibility of realization of ultra long high-bit-rate soliton communication systems. At the present moment it seems most reliable to compensate the optical fiber losses with the help of lumped erbium-doped fiber amplifiers, periodically placed along all the transmission distance. As the value of the erbium fiber amplifier saturation power is not very high (~ 0.5 mW), than the influence of the amplifier saturation could affect on the signal transmission in the soliton regime [2]. The amplifier saturation in soliton communication systems could result in decreasing of the soliton sequence signal-noise ratio. This effect can be accumulated after transmission through a large number of amplifiers (> 300 for L ≈ 10000 km [1]).

© 1991 Optical Society of America