Benefits of counterpropagating Raman amplification for multiband optical networks

Multiband (MB) optical fiber transmission systems can unlock additional capacity in existing infrastructures, enabling them to keep up with the increase traffic demand while postponing costly deployments. However, due worse characteristics of MB than C-band-only transmission, network’s overall spectral efficiency decreases when increasing bandwidth. The extent this performance degradation is paramount determining commercial viability deploying systems. By estimating generalized signal-to-noise ratio using GNPy library, work analyzes impact counterpropagating Raman amplification improve an S + mathvariant="normal">C mathvariant="normal">L -band system comprising a total bandwidth 15.5 THz. proposed mitigate resulting from stimulated scattering effect and noise figure S-band amplifier. We show that optimized deployment pump makes it possible not only but also equalize network-wide system, which potentially reduces complexity routing wavelength assignment algorithms. capacity, efficiency, number feasible lightpaths are compared C- without on two reference networks. Results similar amplification. These results provide evidence strategy be effectively used compensate for systems, higher amplifier, SRS effect, losses band demultiplexer coupler required at every stage separate bands. Overall, simulation highlight single approximately carry same data THz (and amplification) as three parallel fibers (without amplification).