Transparent service delivery in elastic metro/access networks with cost-effective programmable transceivers

Abstract

In this paper, we present and experimentally validate a transparent signal delivery scheme using programmable sliceable bandwidth/bit rate variable transceivers (S-BVTs), for converged optical access/metro networks. A programmable transceiver based on discrete multitone (DMT) directly modulated vertical cavity surface-emitting laser (VCSEL) and direct detection (DD) is proposed to efficiently increase the cost-effectiveness and scalability of the network. Variable data rates are enabled for a maximum optical spectrum occupancy of 9 GHz, while coping with a minimum power budget of 20 dB in the access segment. This allows to fully exploit system flexibility while enabling photonic integration.

Modular SDN-enabled S-BVT Adopting Widely Tunable MEMS VCSEL for Flexible/Elastic Optical Metro Networks

“…VCSELs have been usually considered for short-reach, low-datarate applications at 850nm. Recently, their potential has been shown at 1550nm with advanced modulation formats for 100G applications as well as for PONs and metro/access elastic optical networks (EONs) [2][3][4]. Multicarrier modulation, as discrete multitone (DMT) or orthogonal frequency division multiplexing (OFDM), enables spectral manipulation, implementing bit and power loading (BL/PL) at digital signal processing (DSP).…”

Enabling Programmable Multiband High-Capacity Optical Transceivers

“…These nodes have also to support MB switching capabilities to aggregate and distribute the MB flows [9]. At the access segment a simpler transceiver architecture is envisioned as a simple cost-effective MB BVT, that can also work at different wavelengths beyond C-band, promoting a transparent delivery over the two identified network segments [10].…”

Synergy of Photonic Technologies and Software-Defined Networking in the Hyperconnectivity Era

“…SSB optical filtering can be performed at the S-BVT aggregator stage or at the network nodes, if suitably equipped with bandwidth variable WSS, so that the optical filtering could be performed at any node. In case of adopting narrow-BW VCSEL, a similar path (200 km) can be established at the expenses of the supported capacity (8 Gb/s), considering DMT and DD [27]. For targeting 100 Gb/s and beyond applications, large-BW VCSELs should be adopted.…”