Adiabatic compression of Schrödinger solitons due to the combined perturbations of higher-order dispersion and delayed nonlinear response

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Abstract
We demonstrate for the first time that in a homogeneous nonamplifying physical system described by the nonlinear Schrödinger equation, the combined effects of two different perturbations (delayed nonlinear response and higher-order dispersion) can lead to adiabatic compression of fundamental solitons. This is unexpected since each of these perturbations operating independently destroys soliton propagation. Experimentally this is demonstrated by showing that 95 fsec fundamental solitons are redshifted from 1.57 to 1.62 μm and adiabatically compressed to 55 fsec in 65 m of a single-mode silica fiber with modified dispersion.