O. Leclerc et al., Simultaneously regenerated 4 x 40Gbit/s dense WDM transmission over 10,000km using single 40GHz InP Mach-Zehnder modulator, ELECTR LETT, 36(18), 2000, pp. 1574-1575
Simultaneous optical regeneration of four 200GHz-spaced 40Gbit/s channels i
n a single polarisation-insensitive InP Mach-Zehnder modulator is demonstra
ted by means of a dense WDM loop transmission over 10,000km, yielding spect
ral efficiency of 0.27(bit/s)/Hz.