Analytical results of the stimulated Raman self-scattering influence on the
propagation of femtosecond optical solitons are presented. The spectral pe
rturbation method is developed, and we show that this method allows to obta
in a quantitative estimation of the frequency shift for an arbitrary relati
on between the parameters of the soliton pulse and the Raman line. (C) 2001
Published by Elsevier Science B.V.