We detail the propagation characteristics of a solitonlike single nonlinear pulse in an average normal group-velocity dispersion (GVD) region under two-step dispersion management. We compare the pulse characteristics with numerical results obtained by the variational method. Even when the dispersion swing is large, a steady-state solitonlike solution can be obtained only when the average effective dispersion becomes anomalous. We describe a pulse–pulse interaction based on a pair of nonlinear pulses and show that there is a large pulse interaction in the average normal GVD region. We show with a <i>Q</i>-mapping technique that such a nonlinear pulse train is unsuitable for high-speed, long-distance optical communication because of this strong pulse interaction.
© 2001 Optical Society of America
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(060.4510) Fiber optics and optical communications : Optical communications
(060.5530) Fiber optics and optical communications : Pulse propagation and temporal solitons
Masataka Nakazawa, Akio Sahara, and Hirokazu Kubota, "Propagation of a solitonlike nonlinear pulse in average normal group-velocity dispersion and its unsuitability for high-speed, long-distance optical transmission," J. Opt. Soc. Am. B 18, 409-418 (2001)