C-band Single-lane 100G ER and 50G ZR PAM Transmissions based on Joint Optical-electrical Feedforward Equalization (OE-FFE) with Record-low Complexity

We demonstrate C-band 112Gb/s PAM4 over 50km single-mode fiber enabled by joint OE-FFE. An optical single-tap delay line and record-low-complexity 31-tap symbol-spaced FFE suffice to achieve 6.7% HD-FEC-compliant BER. 60Gb/s ZR transmission is also reported.