With the exponential growth of traffic driven by video and Internet services, WDM systems
evolve regularly to increase optical fiber capacity. To meet the relentless need for capacity …

Flexible grid optical networks are emerging as an appealing solution for future high-speed
optical transport because they can provide superior flexibility and scalability and cope with …

In this work we detail the strategies adopted in the European research project IDEALIST to
overcome the predicted data plane capacity crunch in optical networks. In order for core and …

Flexgrid technology is now considered to be a promising solution for future high-speed
network design. In this context, we need a tutorial that covers the key aspects of elastic …

We develop a closed-form expression in order to assess the nonlinear performance of flex-
grid optical transmission systems. This simplified expression can estimate the performance …

Future flexible-grid elastic optical networks are very promising due to their higher spectrum
efficiency and flexibility comparing to the rigid spectrum grid optical networks realized with …

Higher-order modulation formats and spectral super-channels are key to maximizing
spectral efficiency (SE) in next-generation optical transport networks, thereby …

Flexgrid technology is an interesting solution to improve network capacity. However, for a
given spectral band, it gives rise to the increase of the number of channels, requiring more …

Rigid fixed-grid wavelength division multiplexing (WDM) optical networks can no longer
keep up with the emerging bandwidth-hungry and highly dynamic services in an efficient …

There is a growing awareness that the utilized bandwidth of deployed optical fiber is rapidly
approaching its maximum limit. Given the possibility for such capacity crunch, the research …