A 4-dB reduction of the optical signal-to-noise ratio admissible by an all-optical regenerator is demonstrated. Applied to long-haul transmission, an error-free 10-Gbit/s NRZ transmission over 170,000 is performed with 170-km repeater spacing.
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We have described how optical techniques could be used to offer at the same time capacity of transport required and flexibility to envisage a progressive but rapid evolution of the node throughputs. The paper describes two kinds of optical nodes enabling circuit and packet switching connections. Two introduction scenarios have been proposed: one for the… (More)