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Commercial applicability of 42.7 Gb/s/spl times/32 WDM trans-oceanic system has been assured through 4,300 km straight-line transmission, with Q value performance higher than 10.2 dB, which is better than a detection limit of 8.8dB.
We have investigated various span configurations suitable for a distributed all-Raman amplification system over long distance. By our proposed configuration, 6,050-km WDM transmission of 32 chtimes42.7 Gb/s signals was achieved with a practical symmetrical-structure
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