doi:10.1364/JOCN.9.001116engSarmiento, S.Altabas, J.A.Izquierdo, D.Garces, I.Spadaro, S.Lazaro, J.A.Cost-Effective DWDM ROADM Design for Flexible Sustainable Optical Metro-Access NetworksART-2017-105555Architectural changes are required for the underlying networks to support the expected Internet data traffic volume growth caused by the popularization of cloud services, 5G-based services, and social networks, to provide a highly dynamic connectivity. Cost-effective and energy-efficient solutions for flexible network subsystems are required to provide future sustainable networks. In this paper, we present a cost-effective dense wavelength division multiplexing (DWDM) reconfigurable optical add/ drop multiplexer (ROADM) design enabling optical metro -access networks convergence. The cost-effective DWDM ROADM capabilities also have been assessed in an ultradense wavelength multiplexing (u-DWDM) ring network scenario. In particular, achievable network throughput has been considered.2017http://zaguan.unizar.es/record/16783910.1364/JOCN.9.001116http://zaguan.unizar.es/record/167839oai:zaguan.unizar.es:167839info:eu-repo/grantAgreement/ES/DGA/T25info:eu-repo/grantAgreement/ES/MICINN/TEC2014-59583-C2-1-Rinfo:eu-repo/grantAgreement/ES/MINECO/BES-2015-074302info:eu-repo/grantAgreement/ES/UZ/CUD2016-18Journal of Optical Communications and Networking 9, 12 (2017), 1116-1124All rights reservedhttp://www.europeana.eu/rights/rr-f/info:eu-repo/semantics/openAccess