ROADM architectures for multi-band optical networks

• Autor(a) principal: Ramos, João Frederico de Almeida Raposo do Ó
• Data de Publicação: 2023
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10071/30593
• topic: Rede ótica -- Optical network; Multi-band; Multiplexador add-drop óptico reconfigurável Reconfigurable optical add-drop multiplexer (ROADM); All-optical wavelength converter; Cost-per-bit; Physical layer impairments; Multibanda; Conversor de comprimento de onda ótico; Custo-por-bit; Limitações da camada física

Nowadays with the exponential increase of 5G mobile, datacenter communications and low-latency services, there is a huge demand for more data capacity and flexibility in optical networks. The multi-band (MB) is a mid-term solution to increase capacity and surpass the C-band transmission limitations. This dissertation analyzes the impact of several node architectures on the design of C+L+S MB networks. Three MB node architectures - baseline, common-band and compact - are studied in terms of cost-per-bit and induced-physical layer impairments (PLIs). We develop a routing, modulation format and spectrum assignment (RMSA) network planning tool, based on a Monte-Carlo simulation, that incorporates the impact of the node architecture and PLIs. This RMSA tool calculates the total network capacity and cost-per-bit of a given network topology, for the different MB node architectures. The common-band architecture presents the lowest cost-per-bit compared to the remaining MB architectures when the PLIs are neglected, since only lower cost C-band components are used. In a network scenario, with the PLIs impact, the common-band architecture leads to the lowest total network capacity and highest cost-per-bit due to additional noise from all-optical wavelength converters. The common-band cost-per-bit is almost twice the compact and baseline cost-per-bit due to the PLIs-induced degradation.