title: Soliton propagation in multimode optical fibers.
abstract: Soliton propagation in a multimode optical fiber in the presence of an intensity-dependent refractive index is investigated by means of a set of nonlinear coupled equations derived in the frame of coupled-mode theory. In particular, the conditions on modal amplitudes and modal dispersion necessary for soliton existence are derived.
authors.affiliation: Fondazione Ugo Bordoni, Istituto Superiore P.T., Viale Europa, Rome, Italy.
authors.forename: B
authors.initials: B
authors.lastname: Crosignani
authors.forename: P D
authors.initials: PD
authors.lastname: Porto