Diffusion of optical pulses in dispersion-shifted randomly birefringent optical fibers

摘要

An effect of polarization-mode dispersion, nonlinearity and random variationof dispersion along an optical fiber on a pulse propagation in a randomlybirefringent dispersion-shifted optical fiber with zero average dispersion isstudied. An averaged pulse width is shown analytically to diffuse withpropagation distance for arbitrary strong pulse amplitude. It is found thatoptical fiber nonlinearity can not change qualitatively a diffusion of pulsewidth but can only modify a diffusion law which means that a root mean squarepulse width grows at least as a linear function of the propagation distance.