Abstract
In this paper, we examine how typical transmission systems can be made
tunable in datarate, up to 100 Gb/s, through modulation-format versatility.
We investigate through extensive numerical simulations the available reach
versus datarate, taking in particular into account the nonlinear interaction
between channels in this mixed-format context. We show how these versatile
transmission systems can be used to design a so-called elastic optical network
in which the datarate of a wavelength is adapted to both the traffic that
needs to be transported and the amount of physical impairments that need to
be overcome. We examine the benefits of such elastic optical networks in the
case of a European backbone network, showing that elastic architectures outperform
fixed-rate networks by up to 21% in terms of required number of opto-electronic
interfaces.
© 2011 IEEE
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