Eur. Phys. J. D 59, 443-449 (2010)
https://doi.org/10.1140/epjd/e2010-00161-1

Ultrashort soliton pulses in the modified nonlinear Schrödinger equation with distributed coefficients in inhomogeneous fibers

¹ State Key Laboratory of Software Development Environment, Beijing University of Aeronautics and Astronautics, 100191, Beijing, China
² School of Science, P.O. Box 122, Beijing University of Posts and Telecommunications, 100876, Beijing, China
³ Key Laboratory of Information Photonics and Optical Communications (BUPT), Ministry of Education, P.O. Box 128, Beijing University of Posts and Telecommunications, 100876, Beijing, China

Corresponding author: ^a tian.bupt@yahoo.com.cn

Received: 29 June 2009
Revised: 27 November 2009
Published online: 11 June 2010

Abstract

This paper investigates a variable-coefficient modified nonlinear Schrödinger model for describing the ultrashort pulse dynamics with the distributed dispersion, self-phase modulation, self-steepening and linear gain/loss. Under specified soliton management conditions, the bright one- and two-soliton solutions are analytically derived by the Hiroa bilinear method. Dynamical behaviors and main features of the ultrashort pulse propagation in inhomogeneous fibers are discussed by analyzing some important physical quantities. Additionally, interactions of two neighboring ultrashort pulses with varying management parameters are investigated in detail. Results obtained in this paper will be of certain value to the studies on the propagation and application of the ultrashort pulse in the dispersion-managed fiber system.