Abstract
Future optical networks will have to support DWDM line rates beyond 100 Gb/s and transport data with much higher spectral efficiency than today’s networks, so as to meet the rapidly increasing demand for transmission capacity. At the same time, these networks need to provide increased flexibility at the optical layer to allow fast and automated provisioning of capacity wherever and whenever it is demanded. In this contribution we describe the different requirements that such high-speed agile optical networks pose on wavelength-selective switches and ROADM node architectures and then discuss the technology options that are available for building next-generation wavelength switching nodes.
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