Enviaments recents

  • A study of flexible bandwidth allocation in statistical OFDM-based PON 

    Cano Valadéz, Iván Nicolás; Escayola Elias, Francisco Javier; Peralta Gallardo, Ángel; Polo Querol, Víctor; Santos Blanco, M. Concepción; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The upstream of an OFDM-PON with direct modulated lasers tuned in temperature was experimentally tested. Results demonstrate flexible bandwidth allocation, and show it constitutes an efficient strategy to cope with the ...
  • Global concurrent optimization: advantages and opportunities in flexgrid-based networks 

    Castro Casales, Alberto; Velasco Esteban, Luis Domingo; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In future flexgrid core networks the amount of lightpaths might increase significantly as a consequence of the finer granularity in the use of the optical spectrum. Different spectrum bandwidth can be allocated to each ...
  • An elastic networks OMNeT++-based simulator 

    Asensio Garcia, Adrian; Castro Casales, Alberto; Velasco Esteban, Luis Domingo; Comellas Colomé, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    An increasing number of studies about flexgrid-based elastic optical networks are currently being carried out by industry as well as academic research teams. As access to real test-beds is limited, there is a lack of ...
  • Cross-connection management specialisation for WDM-OTN's 

    Rafel, Albert; Comellas Colomé, Jaume; Junyent Giralt, Gabriel; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2000)
    Text en actes de congrés
    Accés obert
    WDM optical transport networks (WDM-OTN) will use new all-optical nodes that will perform functions in the optical domain, using wavelength as a new network resource. This paper presents a new approach for the optical ...
  • Modelling and performance evaluation of a national scale switchless based network 

    Careglio, Davide; Solé Pareta, Josep; Junyent Giralt, Gabriel; Spadaro, Salvatore; Masip Torne, Jaume; Noguera Serra, Juan José (Springer, 2000)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In a packet switching based scenario, optical technologies can not completely overcome the problem of insufficient network capacity, due to limitations produced by the presence of electronic switches and regenerators in ...
  • Raman laser fiber optic strategy for non-destructive pigment analysis 

    Ruiz Moreno, Sergio; Soneira Ferrando, M. José; Pérez Pueyo, Rosanna; Gabaldón Borque, Amador José; Sandalinas Linares, Maria Carmen (Office for official publications of the European communities, 2000)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this work, the strategy, performances and applications of a Raman spectroscopy system with both optical fibre technology and two lasers (red and green) are presented. With this system, we have investigated certain yellow ...
  • A novel methodology for measuring coherent homowavelength crosstalk in an optical signal supervisory system 

    Rafel Porti, Alberto; Prat Gomà, Josep Joan; Sales Zaragoza, Vicente (Optical Society of America, 1999)
    Text en actes de congrés
    Accés obert
    We present a novel, easy, and cost-effective methodology that allows an optical signal supervisory system the detection, isolation, and measurement of the coherent homowavelength crosstalk within an optical node. It also ...
  • Optical monitoring system for scalable all-optical networks 

    Amrani, Abdelhafid; Roldán Andrade, Jesús; Junyent Giralt, Gabriel (THE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, INC., 1997)
    Text en actes de congrés
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    High traffic and high capacity communications are believed to become cost-effective with the use of all-optical networks based on OFDM (optical frequency division multiplexing). In such networks, new strategies for OA and ...
  • Bidirectional coherent PON with ONU based on reused direct-modulated LO 

    Cano Valadez, Iván Nicolás; Bottoni, Fabio; Velásquez Micolta, Juan Camilo; Presi, Marco; Ciaramella, Ernesto; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    We demonstrate a bidirectional coherent PON based on a direct-modulated upstream signal reused as LO. The proposed system achieves -46/-48 dBm downstream/upstream sensitivity at BER=10-3.
  • 7.5 Gb/s direct DFB phase modulation with 8-DPSK for 6.25 GHz spaced coherent UDWDM-PONs 

    Cano Valadez, Iván Nicolás; Velásquez Micolta, Juan Camilo; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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    We demonstrate an 8-DPSK directly phase-modulated DFB with intradyne detection in a 50 km, 6.25 GHz channel spaced UDWDM-PON. A bit rate of 7.5 Gb/s is achieved with Rx sensitivity of -31 dBm at BER=10-3.

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