D. Le Guen et al., Narrowband 640Gbit/s soliton DWDM transmission over 1200km of standard fibre with 100km-21dB amplifier spans, ELECTR LETT, 34(24), 1998, pp. 2345-2346
640 Gbit/s (32 x 20 Gbit/s) soliton dense wavelength division multiplexing
(0.4 nm channel-spacing) transmission over 1200 km with 100 km dispersion-c
ompensated spans of standard step-index fibre is demonstrated.