Programmable SDN-Enabled S-BVT Based on Hybrid Electro-Optical MCM

Abstract

A programmable SDN-enabled sliceable bitrate variable transceiver based on hybrid electrooptical multicarrier modulation as a key enabler for superchannel generation in future 5G metro networks is proposed. Multiple discrete multitone signals can be multiplexed/demultiplexed with optical orthogonal transform processors such as spectral selective switches (SSSs). By implementing optical spectrallyefficient transforms at the SSSs, we are able to generate a high capacity superchannel to support the transmission targets envisioned in 5G networks. Specifically, the optimal transform can be programmed by the control plane through the corresponding SDN agents by suitably configuring the phase and attenuation of the SSS's ports. Furthermore, with the adoption of MCM formats, increased system/network flexibility is achieved. In this work, two different transceiver configurations have been proposed and assessed. They are based on intensity modulation with direct detection and amplitude modulation with coherent reception. A flexible receiver configuration selection is envisioned according to the target network requirements/condition.

Programmable Adaptive BVT for Future Optical Metro Networks Adopting SOA-Based Switching Nodes

“…In [25], DMT transmission and coherent detection has been demonstrated in flexgrid metro networks covering distances up to 150 km. More recently, in [26] two different transceiver configurations have been experimentally validated. One is based on intensity modulation with DD and the other on amplitude modulation with coherent reception for the metro networks.…”

“…OFDM based on SSB or VSB can be adopted with DD to simply maintain architecture [7,20,21,24]. To enhance the impairment tolerance and the achievable distance, coherent detection can also be used as in [25,26].…”

Sliceable BVT Evolution Towards Programmable Multi-Tb/s Networking

“…This option limits the flexibility and programmability of the transceiver architecture, even though with the advent of programmable photonics, it is possible to envision future attractive solutions [29]. A hybrid and electro-optical MCM scheme exploiting both super-and sub-wavelength granularity is proposed and assessed in [30], where the multiple flows are packed into super-channels by optically implementing the discrete wavelet packet transform (DWPT) and its inverse. This allows to increase the S-BVT spectral efficiency and can be either implemented by suitably programming an LCoS-based BV-WSS or using Mach-Zehnder interferometers integrated with silicon-on-insulator (SOI) technology.…”

“…SSB-OFDM is more robust against CD over multi-hop paths and offers better performance also with the S-BVRx module based on DM-VCSEL (the table reports results for widely tunable MEMS-VCSELs) [33]. Finally, as shown in Reference [30], CO-Rx allows to achieve high robustness against accumulated dispersion. [30] [8] 1 optical bandwidth occupation in terms of flexi-grid slots of 12.5 GHz; 2 with 50-GHz WSS; 3 with 10 cascading nodes including 100-GHz AWGs and 50-GHz WSS; 4 10 Gb/s net target bitrate (UL) connection.…”

“…SSB-OFDM is more robust against CD over multi-hop paths and offers better performance also with the S-BVRx module based on DM-VCSEL (the table reports results for widely tunable MEMS-VCSELs) [33]. Finally, as shown in Reference [30], CO-Rx allows to achieve high robustness against accumulated dispersion. As described in Figure 4, the ADRENALINE testbed network consists of four nodes: two optical cross-connects (OXCs) and two reconfigurable optical add-drop multiplexers (ROADMs); two of them (OXC-2 and ROADM-1) are equipped with programmable BV-WSS modules, enabling flexigrid connections.…”