doi:10.1364/OE.24.000555engAltabás Navarro, José AntonioIzquierdo Nuñez, DavidLazaro Fernandez, Jose AntonioLerín, AdolfoSotelo Hermida, Félix AntonioGarcés Gregorio, Juan Ignacio1Gbps full-duplex links for ultra-dense-WDM 6.25GHz frequency slots in optical metro-access networksART-2016-943971Gbps full-duplex optical links for 6.25GHz ultra dense WDM frequency slots are demonstrated and optimized for cost-effective metro- access networks. The OLT-ONU downlinks are based on 1Gbps Nyquist- DPSK using MZM and single-detector heterodyne reception obtaining a sensitivity of -52dBm. The ONU-OLT uplinks are based on 1Gbps NRZ- DPSK by directly phase modulated DFB and also single-detector heterodyne reception obtaining same sensitivity of -52dBm. The power budget of full-duplex link is 43dB. These proposed links can provide service to 16 (32) users at each 100 (200) GHz WDM channel.2016http://zaguan.unizar.es/record/4845510.1364/OE.24.000555http://zaguan.unizar.es/record/48455oai:zaguan.unizar.es:48455info:eu-repo/grantAgreement/ES/MICINN/TEC2014-59583-C2-1-Rinfo:eu-repo/grantAgreement/ES/MINECO/TEC2013-46917-C2-2-ROPTICS EXPRESS 24 (2016), 555-565byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess