Interaction of short envelope solitons with external wave fields

The interaction of short envelope solitons with external wave fields is con sidered in the framework of the third-order nonlinear Schrodinger equation. First, the scattering of external fields at a soliton with constant parame ters is analyzed. Then the variation of soliton parameters is considered in the adiabatic approximation. This variation is caused by the nonlinear dis persion. Estimates of the amplification of short optical solitons with dura tion of a few femtoseconds in fibers are given. (C) 2000 Elsevier Science B .V. All rights reserved.