Abstract

Internet-generated traffic growth is forcing the development of new low-cost solutions in metropolitan area networks (MANs), in particular in the transceiver and network node architectures. Semiconductor optical amplifier (SOA)-based wavelength blockers can be used as fundamental building blocks to add and drop optical channels in the node architecture of several network hierarchical levels. Even if its employment is advantageous in terms of costs and amplification bandwidth, the SOA can operate in a nonlinear regime. This work analyzes the impact of SOA-based node crossing on high-capacity discrete multitone (DMT) signals. In order to properly evaluate the interplay between optical channels and SOA self-gain modulation, both external and direct modulations are considered. Dual-sideband (DSB) and single-sideband (SSB) DMT variants are taken into account, showing no significant difference in the impact of SOA crossing for external modulation of a DFB laser. On the other hand, an important effect of subcarrier suppression arises on DSB DMT direct modulation of a vertical cavity surface emitting laser (VCSEL), less consistent for SSB DMT direct modulation. The analysis allowed to properly choose the bias current for the SOA employed in an experimental setup used to evaluate the transmission performance in a MAN scenario including add-drop lossless switch nodes. The experimental results demonstrate that a target capacity of more than 50 Gb/s per channel can be achieved in a 116-km MAN network composed of an SOA-based metro-access node and two metro-core aggregators, considering the transmission of three 25-GHzspaced DMT channels.

Architecture for low-cost and highly flexible metro-access networks using SOA-based OADM nodes and digital subcarrier multiplexing with power loading

Zhouyi Hu, Shiyi Xia, Henrique Freire Santana, Marijn Rombouts, Bin Shi, and Nicola Calabretta
Opt. Lett. 49(8) 1904-1907 (2024)

Performance assessment of a fast optical add-drop multiplexer-based metro access network with edge computing

Bitao Pan, Fulong Yan, Xuwei Xue, Eduardo Magelhaes, and Nicola Calabretta
J. Opt. Commun. Netw. 11(12) 636-646 (2019)

Programmable VCSEL-based photonic system architecture for future agile Tb/s metro networks

M. Svaluto Moreolo, J. M. Fabrega, L. Nadal, R. Martínez, R. Casellas, J. Vílchez, R. Muñoz, R. Vilalta, A. Gatto, P. Parolari, P. Boffi, C. Neumeyr, D. Larrabeiti, G. Otero, and J. P. Fernández-Palacios
J. Opt. Commun. Netw. 13(2) A187-A199 (2021)

Flexible transmitters based on directly modulated VCSELs for next-generation 50G passive optical networks

Paola Parolari, Alberto Gatto, Christian Neumeyr, and Pierpaolo Boffi
J. Opt. Commun. Netw. 12(10) D78-D85 (2020)

Experimental demonstration of a metro area network with terabit-capable sliceable bit-rate-variable transceivers using directly modulated VCSELs and coherent detection

J. M. Fabrega, F. J. Vílchez, M. Svaluto Moreolo, R. Martínez, A. Quispe, L. Nadal, R. Casellas, R. Vilalta, R. Muñoz, C. Neumeyr, S. Y. Lee, J. U. Shin, H. D. Jung, G. Mariani, R. Heuvelmans, A. Gatto, P. Parolari, P. Boffi, N. M. Tessema, N. Calabretta, D. Larrabeiti, and J. P. Fernández-Palacios
J. Opt. Commun. Netw. 15(3) A103-A113 (2023)