Numerical Study of 1.6T IM/DD Transmission Based on LWDM Grid Using 200G/Lane Over 2–5 km of Standard Single Mode Fibers

1.6T IM/DD transmission based on LWDM grid using 200G/lane over 2–5 km of single mode fibers is studied. The impact of FWM is assessed over the different fiber distances. FWM can have a significant impact even over 2 km distance, if the zero-dispersion wavelength overlaps with one of the LWDM transmission wavelengths or exactly in the middle of any two wavelengths used. However, when taking into account the LWDM wavelength variation- or drift statistically, the results show significant less impact of FWM degradation. Optical launch power limits are explored to achieve 1.6 T transmission over 5 km distance using KP4 FEC threshold criterion.