Now showing items 1-8 of 8

    • 6.25Gb/s differential duobinary transmission in 2GHz BW limited direct phase modulated DFB for udWDM-PONs 

      Cano Valadéz, Iván Nicolás; Lerín de la Santísima Trinidad, Adolfo; Presi, Marco; Polo Querol, Víctor; Ciaramella, Ernesto; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      A differential duobinary codification is proposed for directly phase modulating a 2GHz BW equalized DFB laser. The method was tested with homodyne coherent detection achieving 6.25Gb/s bitrate transmission with -38.5dBm ...
    • 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)
      Conference report
      Restricted access - publisher's policy
      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.
    • COCONUT requirements for residential, business and outdoor scenarios 

      Vall-llosera, Gema; Rafel, Albert; Ciaramella, Ernesto; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      Five basic requirements have been defined for the COCONUT ultra-dense WDM PON architecture: (1) untouched optical distribution network, (2) no active components, (3) no intervention in the outside plan, (4) smooth upgrade ...
    • Hitless dynamic wavelength allocation in coherent WDM-PONs 

      Presi, Marco; Rannello, M.; Artiglia, Massimo; Tomkos, Ioannis; Cano Valadez, Iván Nicolás; Prat Gomà, Josep Joan; Ciaramella, Ernesto (2016)
      Conference lecture
      Restricted access - publisher's policy
      We introduce a novel algorithm for real-time ONU activation (¿ - assignment) and reconfiguration (¿ - tuning) in WDM coherent PONs. The algorithm prevents service interruption of lighted channels and it is experimentally ...
    • Hitless wavelength assignment in filterless optical access networks 

      Presi, Marco; Rannello, M.; Artiglia, Massimo; Tomkos, Ioannis; Cano Valadez, Iván Nicolás; Prat Gomà, Josep Joan; Ciaramella, Ernesto (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      Advantages offered by coherent detection systems in access networks are not limited to the increase of power budget due to the superior sensitivity. Channel selectivity is another intriguing feature offered by coherent systems ...
    • Low cost solutions implementing ultra-dense-WDM in access 

      Prat Gomà, Josep Joan; Ciaramella, Ernesto (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      A high-level optical access network based on coherent technology supporting ultra-dense Wavelength Division Multiplexing (WDM) is developed in the EU FP7 COCONUT project (COst-effective COherent ultra-dense-WDM-PON for ...
    • Real-time coherent ONU for ¿-to-the-user based on fully analogue processing of OOK signals 

      Bottoni, Fqabio; Presi, Marco; Artiglia, Massimo; Prat Gomà, Josep Joan; Ciaramella, Ernesto (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      Using fully-analogue and commercially available electronics, we realize a real-time coherent ONU receiver for Ultra-Dense WDM-PON based on intensity-modulated signals. The receiver also requires common photonic components ...
    • Technologies for cost-effective udWDM-PONs 

      Prat Gomà, Josep Joan; Cano Valadez, Iván Nicolás; Presi, Marco; Tomkos, Ioannis; Klonidis, Dimitrios; Vall-llosera, Gema; Brenot, Romain; Pous, R.; Papastergiou, george; Rafel, Albert; Ciaramella, Ernesto (2016-01-15)
      Article
      Open Access
      New technologies for ultradense WDM-PON (udWDM-PON), enabled by coherent techniques and low-cost devices, are developed for an efficient utilization of the optical spectrum, revealing that the “Wavelength-to-the-User” ...