Experimental demonstration of 56 Gb/s 4D-PAM-5 trellis coded modulation for 400G WDM metro-access networks. - Cristian Prodaniuc; Nebojsa Stojanovic; Zhang Qiang; Fotini Karinou; Thomas Lee; Klaus Engenhardt; Roberto Llorente (OFC, 2016)

Single carrier 1.2 Tbit/s transmission over 300 km with PM-64 QAM at 100 GBaud. - Karsten Schuh; Fred Buchali; Wilfried Idler; Tobias A. Eriksson; Laurent Schmalen; Wolfgang Templ; Lars Altenhain; Ulrich Dumler; Rolf Schmid; Michael Möller 004; Klaus Engenhardt (OFC, 2017)