Abstract

I discuss the role of group-velocity dispersion when a soliton propagates in a Raman-active medium. Using a modified beam-propagation method, I generate a pump soliton by inducing a phase shift of order π in an input Stokes seed. As the pulses propagate with different velocities because of the frequency dependence of the refractive index, pulse walk-off effects cause the soliton to decay and to break up. This gives rise to a new effect: the generation of a Stokes pulse whose width is comparable with the pump soliton width and whose height may be a factor of 2 larger than the maximum input pump field amplitude.

© 1994 Optical Society of America

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