Tool Used:
PAM-4 (4ary pulse amplitude modulation) has been of immense interest lately for high-speed data links [1]-[3].
This application note demonstrates 8-channel WDM transmission over multimode fiber where each PAM-4 channel operates at a baud rate of 25 GBd. performance is observed in terms of received eye diagrams for two different lengths of the fiber. Figure 1 shows the layout of the system.