“…Large-capacity OTDM/WDM transmission experiments combining OTDM and ultra-wideband WDM technologies have been demonstrated by NTT already since 1995 [114]. In 1997 and 1999 NTT reported 1.4 Tb/s (200 Gb/s  7 -channel, OOK, SP multiplexing) and 3 Tb/s (160 Gb/s  19 -channel, OOK, SP multiplexing) transmission over 50 and 40 km DSF respectively [90,91].…”