O. Leclerc et al., Dense WDM (0.27bit/s/Hz) 4 x 40Gbit/s dispersion-managed transmission over10000km with in-line optical regeneration by channel pairs, ELECTR LETT, 36(4), 2000, pp. 337-338
4 x 40Gbit/s wavelength division multiplexed, dispersion-managed transmissi
on over transoceanic distances with a record spectral efficiency of 0.27 (b
it/s)/Hz has been achieved using simultaneous in-line optical regeneration
by a channel pair.