Analysis of WDM and OTDM 256-QAM for 1 Tb/s Transmission Link

We provide feasibility study of building a 1 Tb/s (16$\times$4.375 Gbaud) Pol-Mux 256-QAM, 10 km link using WDM and OTDM. WDM meets the SNR requirement, but OTDM does not and has to reduce tributary count.