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We compared two different mid-term migration scenarios for core network capacity scaling, realized using either multi-band or multi-fiber systems. We show, under realistic assumptions of current costs, that the multi-fiber system is more cost-effective.
Upgrading the capacity of backbone optical networks while delivering contents to the end-users with a reduced cost per bit is a day-by-day challenge of network operators. In this paper, we first discuss several mid-term options for capacity upgrades including migration to multi-fibre and multi-band systems (utilizing amplification systems with bandwidth extending over the C+L or the S+C+L bands)....
The selective placement of additional Hybrid Raman-EDFA amplification provides an effective mechanism to improve the energy and spectral efficiency of mixed-line-rate WDM networks. The energy efficiency per GHz is increased up to 50% and the network capacity is doubled.
We propose an optimization on the amplifier placement to enhance the energy efficiency of the future optical transport networks based on WDM with mixed line rate transmissions. Simulation results show significant energy efficiency per GHz improvements of up to 74% thanks to the deployment of additional amplifiers, allowing for the utilization of more energy and spectral efficient modulation formats.
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