title: Theory of nonlinear pulse propagation in inhomogeneous waveguides.
abstract: An approximate treatment of solitons (nonlinear pulses) in inhomogeneous waveguides is presented. We find that, for slowly varying inhomogeneity, both bright and dark solitons are supported by waveguides. These solitons acquire a time-dependent velocity and acceleration but otherwise propagate through the waveguide without changing shape.
authors.forename: B
authors.initials: B
authors.lastname: Bendow
authors.forename: P D
authors.initials: PD
authors.lastname: Gianino