OPTIMAL TRANSMISSION CONDITION OF NONLINEAR-OPTICAL PULSES IN SINGLE-MODE FIBERS

Optimal transmission conditions of nonlinear optical pulses in single-mode fibers are presented. When an optical pulse propagates in a fiber, it suffers the fiber loss, group velocity dispersion, and self-phase modulation. An optimal output pulse can be obtained by choosing a suitable optical carrier wavelength and an initial input pulse. The system at the optimal condition not only has more stable performance than the dispersion-free system, but also achieves maximum transmission bitrate for a fixed transmission distance. The bit-length product up to 8550 Gb/s.km or more can be achieved by using dispersion-shifted fibers without amplification.