Ara es mostren els items 1-20 de 62

  • 1Gbps full-duplex 5GHz frequency slots uDWDM flexible metro/access networks based on VCSEL-RSOA transceiver 

    Altabas, Jose Antonio; Izquierdo, David; Lázaro Villa, José Antonio; Garces, Ignacio (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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    1Gbps full-duplex 5GHz frequency slot is proposed for uDWDM Flexible Metro-Access Networks. The costeffective ONU transceiver is based on VCSEL as LO for coherent reception and seed for phase-modulated RSOA, providing ...
  • 1Gbps full-duplex links for ultra-dense-WDM 6.25GHz frequency slots in optical metro-access networks 

    Altabas, Jose Antonio; Izquierdo, David; Lázaro Villa, José Antonio; Lerin, Adolfo; Sotelo, Félix; Garces, Ignacio (2016-01-11)
    Article
    Accés obert
    1Gbps 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 ...
  • 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)
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    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; Gene 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
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    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)
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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 ...
  • 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; 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; 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 restringit per política de l'editorial
    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)
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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 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)
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    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)
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    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.
  • Design of flexible udWDM metro-access network devices assisted by high resolution complex spectroscopy 

    Altabas, Jose Antonio; Izquierdo, David; Pascual, Álvaro; Sarmiento Hernández, Samael; Lázaro Villa, José Antonio; Garces, Ignacio; Villafranca, A. (2016)
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    The new cloud services, the Internet of Things (IoT) and the convergence of mobile and optical networks in the 5G scenario are pushing up the traffic demand over the metro-access networks. Flexible ultra-dense Wavelength ...
  • Digital Nyquist WDM for access networks using limited bandwidth reflective semiconductor optical amplifiers 

    Lázaro Villa, José Antonio; Knorr, Sebastian; Bernhard, Schrenk; Cano Valadéz, Iván Nicolás; Polo Querol, Víctor; Prat Gomà, Josep Joan; Carena, Andrea; Bosco, Gabriella (Institute of Electrical and Electronics Engineers (IEEE), 2012)
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    Digital Nyquist-WDM is experimentally demonstrated using RSOA-based colorless ONUs, providing a 6-fold enhancement of transmission capacity through 25km fiber, and showing digital Nyquist-WDM as promising candidate for ...
  • Digitally processed modulation formats and integrated photonics for flexible optical metro-access networks 

    Lázaro Villa, José Antonio; Schrenk, Bernhard; Malligaraj, M.; Cano Valadéz, Iván Nicolás; Parra, M.; Sridharan, Madanagurusamy; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
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    Digitally processed modulations formats such as Nyquist-WDM are investigated for implementation of future flexible optical networks, by using integrated photonic devices and moderate speed optoelectronics. We compare ...