Eur. Phys. J. B 29, 227-231 (2002)
https://doi.org/10.1140/epjb/e2002-00291-9

The modified nonlinear Schrödinger equation: facts and artefacts

B.I. Stepanov Institute of Physics, 220072 Minsk, Belarus

Received: 29 September 2001
Revised: 25 January 2002
Published online: 2 October 2002

Abstract

We argue that the integrable modified nonlinear Schrödinger equation with the nonlinearity dispersion term is the true starting point to analytically describe subpicosecond pulse dynamics in monomode fibers. Contrary to the known assertions, solitons of this equation are free of self-steepening and the breather formation is possible.