doi:10.1109/LPT.2016.2531789engAltabás, José AntonioIzquierdo, DavidLázaro, José AntonioGarcés Gregorio, Juan IgnacioCost-Effective Transceiver Based on an RSOA and a VCSEL for Flexible uDWDM NetworksART-2016-94398A cost-effective transceiver for a 1-Gb/s full-duplex ultra-dense wavelength division multiplexing optical link is proposed for flexible metro-access and 5G networks. The transceiver is based on a vertical cavity surface emitting laser, which is used as the local oscillator for a heterodyne receiver and also feeds a phase-modulated reflective semiconductor optical amplifier (RSOA) transmitter. The modulation format used in the RSOA is a nonreturn-to-zero differential binary phase shift keying (DPSK) for the uplink, while the downlink is based on a Nyquist DPSK format. The central frequencies of the links are 2 GHz separated, and both links can be placed inside a 6.25-GHz frequency slot. The sensitivity of this transceiver is -43.5 dBm over a 50-km fiber.2016http://zaguan.unizar.es/record/16783510.1109/LPT.2016.2531789http://zaguan.unizar.es/record/167835oai:zaguan.unizar.es:167835info:eu-repo/grantAgreement/ES/DGA/T25info:eu-repo/grantAgreement/ES/MICINN/TEC2014-59583-C2-1-Rinfo:eu-repo/grantAgreement/ES/MINECO/TEC2013-46917-C2-2-RIEEE Photonics Technology Letters 28, 10 (2016), 1111-1114All rights reservedhttp://www.europeana.eu/rights/rr-f/info:eu-repo/semantics/openAccess