title: Recent progress in soliton transmission technology.
abstract: Recent progress on time-division multiplexed (TDM) and wavelength-division multiplexed (WDM) soliton transmission is described, in which dispersion management plays an important role in increasing the power margin and the dispersion tolerance. The characteristics of the dispersion-managed soliton are compared with those of return to zero and nonreturn to zero pulses. With a small dispersion swing, the system can still be described as an average soliton using the nonlinear Schrodinger equation, while with a large dispersion swing, the solitonlike steady-state pulse becomes a chirped Gaussian pulse, in which the governing equation is closer to a linear Schrodinger equation with a parabolic potential well. We describe an in-line modulation scheme for up to 80 Gbit/s per channel and its two channel WDM transmission over 10 000 km. Finally, we describe 640 Gbit/s (40 Gbit/sx16 channels) WDM soliton transmission over 1000 km with a dispersion-managed single-mode fiber. (c) 2000 American Institute of Physics.
authors.affiliation: NTT Network Innovation Laboratories, 1-1 Hikarino-oka, Yokosuka-shi, Kanagawa-ken 239-0847, Japan.
authors.forename: Masataka
authors.initials: M
authors.lastname: Nakazawa
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Kubota
authors.forename: Kazunori
authors.initials: K
authors.lastname: Suzuki
authors.forename: Eiichi
authors.initials: E
authors.lastname: Yamada
authors.forename: Akio
authors.initials: A
authors.lastname: Sahara