2.5 Gbit/s-9720 km, 10 Gbit/s-6480 km transmissioninthe FSA commercial system with 90 km spaced opticalamplifier repeaters and dispersion-managed cablesMakoto Murakami, M. Aiki, Youichi Fukada et al.|Electronics Letters|1995Cited by 22
2.5 Gbit/s, 10073 km straight line transmission system experiment using 199 Er-doped fibre amplifiersT. Imai, Tomonori Ito, Makoto Murakami et al.|Electronics Letters|1992Cited by 18
Inline amplifier transmission experiments over 4500 km at 2.5 Gb/sShigeru Saito, T. Ito, M. Aiki et al.|Journal of Lightwave Technology|1992Cited by 12