L. F. Mollenauer, P. V. Mamyshev, and M. J. Neubelt, Bell Labs-Lucent Technologies, Holmdel, N.J.
We have demonstrated massive wavelength division multiplexing (WDM), over transoceanic distances, in multiples of 10 Gbit/sec.1 The vital ingredients to this success were first, solitons, second, sliding-frequency guiding filters, and third, the use of "dispersion-tapered" fiber spans between amplifiers, i.e., spans for which D(z) tends to follow (here in step-wise approximation), the same exponential decay profile as the signal energy.
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