The new cloud services, the Internet of Things (IoT) and the convergence of mobile and optical networks in the 5G scenario are pushing up the traffic demand over the metro-access networks. Flexible ultra-dense Wavelength Division Multiplexing (udWDM) is a promising technology to address all these new requirements at the metro-access networks. These networks are cost sensitive, so vendors and providers are requiring a highly efficient spectrum usage to accommodate the maximum number of users and cost-effective devices for all the different elements on the network. High Resolution Complex Spectrum Analysis is a powerful tool not only to characterise different devices and network architectures, but also to study and design new complex modulation formats over cost-effective light sources, such as DFB and VCSEL, taking advantage of their physical dynamics (chirp). In this paper, some devices for 1 Gbps fullduplex links for udWDM Metro-Access Networks with 6.25 GHz frequency slots are presented and characterized using High Resolution Complex Spectroscopy.

Peer Reviewed