AN ARRANGEMENT OF TRANSMISSION-FIBER DISPERSIONS FOR INCREASING THE SPACING BETWEEN OPTICAL AMPLIFIERS IN LUMPED REPEATER SYSTEMS

This paper proposes a method for suppression of degradation due to nonlinearities in transmission fibers in lumped repeater systems. This method increases optical amplifier repeater spacing by setting a normal dispersion fiber as a transmission fiber, and by setting a 1.3-mu m zero-dispersion wavelength fiber as a dispersion compensator at the end in each repeater spacing so as to keep the total dispersion of the complete amplifier repeater spacing at around zero. By employing this newly proposed method, a less than l-dB power penalty, 10-Gb / s, 950-km transmission experiment has been successfully demonstrated with keeping the repeater spacings at 95 Inn and setting the repeater output power at 13 dBm (20 m(W) over bar$$).