Tool Used: OptSim
This example simulates a realistic scenario of a 40Gbps DWDM link with inter-channel spacing of 50 GHz. Forty individual channels carrying PRBS data are transmitted over a 50 km length of ITU-T G.652 single mode dispersive fiber. The design objective is to utilize distributed Raman amplification to compensate for the link attenuation thereby effectively increasing the inter-EDFA span in a longer-haul link.
The figure below shows a snap-shot of the layout. The multi-line capability of OptSim's CW laser model makes it very convenient to generate the source-grid for simulating WDM channels.