8 Tb/s (80 × 107 Gb/s) DWDM NRZ-VSB transmission over 510 km NZDSF with 1 bit/s/Hz spectral efficiency. - Karsten Schuh; Eugen Lach; Bernhard Junginger; Gustav Veith; Jeremie Renaudier; Gabriel Charlet; Patrice Tran (Bell Labs Tech. J., 2009)