Abstract

Most of conventional long-haul fibre transmission operate around λ=1.32μm. Semiconductor amplifiers are promising candidates for an all-optical signal amplification in these lines. They are commercially available and can be operated with output intensities typically up to 10mW. Assuming a free propagation through 50km of standard fibre an overall loss of 20dB has to be compensated in each amplifier. To obtain an overall transmission capacity of 10 GB/s the basic pulse duration has to be about 30ps (FWHM). To ensure a distortion free solitonic propagation and to avoid resonance radiation one has to choose a wavelength far from file zero-dispersion-point in the region of an anormalous dispersion. In the further calculations we assumed a value of D=1ps/nm/km. To determine the soliton parameters one has to average over the whole span between two amplifiers. Hence to generate solitons every pulse has to be amplified up to a peak power of 7.8mW.

© 1996 IEEE