112-Gbit/s Intensity-Modulated Direct-Detect Vestigial-Sideband PAM4 Transmission over an 80-km SSMF Link

Employing vestigial-sideband 4-level pulse amplitude modulation (VSB-PAM4), single-channel as well as five-channel DWDM 112-Gbit/s per wavelength transmission is experimentally demonstrated over an 80-km standard single-mode fiber. Chromatic dispersion is compensated using digital signal processing at the receiver.