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M. Seimetz, L. Molle, D.-D. Gross, B. Auth, R. Freund, "Coherent RZ-8PSK transmission at 30 Gb/s over 1200 km
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J. Yu, X. Zhou, M. F. Huang, Y. Shao, D. Qian, T. Wang, M. Cvijetic, P. Magill, L. Nelson, M. Birk, S. Ten, H. B. Matthew, S. K. Mishra, "17 Tb/s (161$\,\times\,$114 Gb/s) PolMux-RZ-8PSK transmission over 662 km of
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Y. Mori, C. Zhang, K. Igarashi, K. Katoh, K. Kikuchi, "Unrepeated 200-km transmission of 40-Gbit/s 16-QAM
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H. Masuda, A. Sano, T. Kobayashi, E. Yoshida, Y. Miyamoto, Y. Hibino, K. Hagimoto, T. Yamada, T. Furuta, H. Fukuyama, "20.4 Tb/s (204$\,\times\,$111 Gb/s) transmission over 240 km using
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