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Ara es mostren els items 7-26 de 89

    • An all-optical carrier recovery scheme for access networks with simple ASK modulation 

      Schrenk, Bernhard; Bakopoulos, Paraskevas; Kehayas, E.; Maziotis, Alexandros; Lázaro Villa, José Antonio; Avramopoulos, Hércules; Prat Gomà, Josep Joan (IEEE Press. Institute of Electrical and Electronics Engineers, 2011-09)
      Article
      Accés restringit per política de l'editorial
      We theoretically investigate and experimentally demonstrate a scheme for all-optical carrier recovery in loopback access networks that avoids orthogonal or complex modulation formats for the downstream or upstream signals. ...

    • An Open source multiplatform virtual laboratory for engineering education : special focus paper 

      Fernández Canti, Rosa M.; Lázaro Villa, José Antonio; Zarza Sánchez, Sergio; Villar Zafra, Aitor (2012-11)
      Article
      Accés obert
      An autonomous and multiplatform virtual laboratory for educational purposes is presented. The implemented platform includes a server with a SSH (Secure SHell) connection and a separated repository containing the virtual ...

    • Area and laser power scalability analysis in photonic networks-on-chip 

      Abadal Cavallé, Sergi; Cabellos Aparicio, Alberto; Lázaro Villa, José Antonio; Nemirovsky, Mario; Alarcón Cot, Eduardo José; Solé Pareta, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      In the last decade, the field of microprocessor architecture has seen the rise of multicore processors, which consist of the interconnection of a set of independent processing units or cores in the same chip. As the number ...

    • Assessment of Flex-grid/SDM backbone networks under inter-core XT-limited transmission reach 

      Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Lázaro Villa, José Antonio; Pagès Cruz, Albert; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés obert
      In the present paper, we estimate the transmission reach of the optical signals through several state-of-the-art multi-core fibers reported in the literature considering ASE noise and inter-core crosstalk. Using these ...

    • Bandwidth assignment criteria against rayleigh backscattering effect in TDM-PON single-fibre wavelength-reuse networks 

      López Pastor, Eduardo Tommy; Lázaro Villa, José Antonio; Polo Querol, Víctor; Prat Gomà, Josep Joan (IEEE, 2011)
      Text en actes de congrés
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      In this paper, theoretical and numerical analysis for Rayleigh Backscattering (RB) in TDM-PON full-duplex single-fiber bidirectional transmission with burst mode upstream and reflective ONU are presented. The results show ...

    • Build your own optical amplifier: design, implementation and physical model of an Erbium Doped-Fiber Amplifier 

      Lázaro Villa, José Antonio; Martinez de Morentin, Martí; Marzo, Nuria; Rubies, Oriol; Arduengo, Miguel (Universitat Politècnica de Catalunya, 2018-05-31)
      Treball d'assignatura
      Accés obert

    • C + L band extended reach amplified next generation access networks 

      Andre, P. S; Teixeira, A.L.J.; Girão, J.P.; Neto, B.; Rocha, A.M.; Reis, Catarina Isabel Ferreira Viveiros Tavares dos; Dionisio, R.P; Chatzi, Sotiria; Bonada Bo, Francesc; Lázaro Villa, José Antonio (2011-07)
      Article
      Accés restringit per política de l'editorial
      The feasibility of optical amplification solutions for extended reach next generation access networks in C + L bands is studied. Amplification schemes based on Raman fiber amplifier and their combination with remotely ...

    • C plus L band extended reach amplified next generation access networks 

      Andre, P. S; Teixeira, A.L.J.; Girão, J.P.; Neto, B.; Rocha, A.M.; Reis, Catarina Isabel Ferreira Viveiros Tavares dos; Dionisio, R.P; Chatzi, Sotiria; Bonada Bo, Francesc; Lázaro Villa, José Antonio (2011-07-20)
      Article
      Accés restringit per política de l'editorial
      The feasibility of optical amplification solutions for extended reach next generation access networks in C + L bands is studied. Amplification schemes based on Raman fiber amplifier and their combination with remotely ...

    • Chirp-based direct phase modulation of VCSELs for cost-effective transceivers 

      Altabas, Jose Antonio; Izquierdo, David; Lázaro Villa, José Antonio; Garces, Ignacio (2017-02-01)
      Article
      Accés obert
      A 2.5Gb/s DPSK transmitter based on direct phase modulation of a VCSEL using its own chirp is proposed. The VCSEL, which wavelength is 1539.84nm, has been characterized both static and dynamically. The sensitivity of a ...

    • Colorless FSK Demodulation and Detection With Integrated Fabry-Perot-Type SOA/REAM 

      Schrenk, Bernhard; Lázaro Villa, José Antonio; Kazmierski, Christophe; Prat Gomà, Josep Joan (2010-06-01)
      Article
      Accés obert
      A receiver for optical frequency modulated signals, based on colorless demodulation and detection, is presented. An integrated combination of semiconductor optical amplifier (SOA) and reflective electroabsorption modulator ...

    • Colourless FSK/ASK optical network unit based on a Fabry Pérot type SOA/REAM for symmetrical 10 Gb/s WDM-PONs 

      Schrenk, Bernhard; Lázaro Villa, José Antonio; Kazmierski, Christophe; Prat Gomà, Josep Joan (2009-09-20)
      Text en actes de congrés
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      An Optical Network Unit based on colourless detection of optical frequency modulated signals based on a combination of Semiconductor Optical Amplifier and Reflective Electroabsorption modulator with intensity remodulation ...

    • Cost-effective DWDM ROADM design for flexible sustainable optical metro–access networks 

      Sarmiento Hernández, Samael; Altabas, Jose Antonio; Izquierdo, David; Garces, Ignacio; Spadaro, Salvatore; Lázaro Villa, José Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2017-12)
      Article
      Accés obert
      Architectural 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 ...

    • Cost-effective ROADM architecture for C/DWDM metro-access networks convergence 

      Sarmiento Hernández, Samael; Spadaro, Salvatore; Lázaro Villa, José Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The Internet data traffic constant growth caused by the popularization of cloud services, mobile and social networks is requiring changes at the underlying networks in order to enable scalability whereas supporting a highly ...

    • Cost-effective ROADM design to maximize the traffic load capacity of u-DWDM coherent metro-access networks 

      Spadaro, Salvatore; Sarmiento Hernández, Samael; Lázaro Villa, José Antonio (2018-11-01)
      Article
      Accés obert
      The current constant growing in traffic demands caused by the popularization of cloud services, mobile and social networks is requiring architectural changes at the underlying networks so as to provide a more highly dynamic ...

    • Cost-effective transceiver based on an RSOA and a VCSEL for flexible uDWDM networks 

      Altabas, Jose Antonio; Izquierdo, David; Lázaro Villa, José Antonio; Garces, Ignacio (2016-05-15)
      Article
      Accés obert
      A 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 ...

    • Demonstration and field trial of a resilient hybrid NG-PON test-bed 

      Prat Gomà, Josep Joan; Polo Querol, Víctor; Schrenk, Bernhard; Lázaro Villa, José Antonio; Bonada Bo, Francesc; López Pastor, Eduardo Tommy; Omella, M.; Saliou, Fabienne; Trung Le, Quang; Chanclou, Philippe; Leino, D.; Soila, Risto; Spirou, S.; Costa, Liliana; Teixeira, A.; Tosi-Beleffi, G.M.; Klonidis, Dimitrios; Tomkos, Ioannis (2014-10-01)
      Article
      Accés restringit per política de l'editorial
      A multi-layer next generation PON prototype has been built and tested, to show the feasibility of extended hybrid DWDM/TDM-XGPON FTTH networks with resilient optically-integrated ring-trees architecture, supporting broadband ...

    • Demonstration of a full duplex PON featuring 2.5 Gbps Sub Carrier Multiplexing downstream and 1.25 Gbps upstream with colourless ONU and simple optics 

      Fàbrega Sánchez, Josep Maria; López Pastor, Eduardo Tommy; Lázaro Villa, José Antonio; Zuhdi, Muneer; Prat Gomà, Josep Joan (2008)
      Text en actes de congrés
      Accés obert
      We demonstrate a full-duplex DPSK SCM PON operating at 2.5Gbps/1.25Gbps bitrates, with RSOA ONU and simplified scheme. It achieves low sensitivity and is implemented with low-cost components.

    • Demonstration of a remotely dual-pumped long-reach PON for flexible deployment 

      Chanclou, Philippe; Schrenk, Bernhard; Lázaro Villa, José Antonio; Klonidis, Dimitrios; Bonada Bo, Francesc; Saliou, Fabienne; Polo Querol, Víctor; López Pastor, Eduardo Tommy; Le, Q.T.; Brenot, Romain; de Valicourt, Guilhem; Spirou, S.; Soila, Risto; Leino, D.; Tosi Beleffi, Giorgio M.; Tomkos, Ioannis; Chatzi, Sotiria; Teixeira, A.; Costa, L.; Kazmierski, Christophe; Prats, Jordi (2012-04-01)
      Article
      Accés restringit per política de l'editorial
      We propose and experimentally demonstrate a flexible wavelength division multiplexing/time division multiplexing network architecture for converged metro-access environment. Entire passiveness in the fiber plant is ...

    • Deployment analysis of TDM/WDM single fiber PON with colourless ONU operating at 2.5 Gbps subcarrier multiplexed downstream and 1.25 gbps upstream 

      Fàbrega Sánchez, Josep Maria; El Mardini, Ahmad; Polo Querol, Víctor; Lázaro Villa, José Antonio; López Pastor, Eduardo Tommy; Soila, Risto; Prat Gomà, Josep Joan (2010)
      Text en actes de congrés
      Accés obert
      A single-fiber full-duplex hybrid TDM/WDM-PON is demonstrated to operate at 2.5/1.25 Gbps rates, with RSOA ONU. It achieves high power budget (GPON compliant) at a distances higher than 20km, and serves up to 1280 users.

    • Desarrollo de un entorno de simulación para el aprendizaje de un algoritmo de navegación autónoma de un velero de 2 metros de eslora 

      Chacón Mosquera, Esteban; Mesegué Basallo, Josep Eudald; Fernández Canti, Rosa M.; Lázaro Villa, José Antonio (Universidade da Coruña. Servizo de Publicacións, 2021)
      Comunicació de congrés
      Accés obert
      Se presenta el desarrollo de un entorno virtual de simulación basado en Python Turtle para el entrenamiento de un algoritmo de aprendizaje por refuerzo destinado a la navegación autónoma de un velero de 2 metros de eslora. ...