Now showing items 1-17 of 17

    • Control and management requirements for a coherent ultra-dense WDM PON for lambda to the user access networks 

      Ververidis, Christopher; Tomkos, Ioannis; Klonidis, Dimitrios; Rafel, Albert; Parkin, Neil; Urban, Patryk; Prat Gomà, Josep Joan; Segarra Mullerat, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
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      In this paper we first highlight the arising MAC-layer requirements for a coherent ultra-dense WDM PON for full and shared lambda to the user access networks. We then report on the appropriate modifications of the XGPON ...
    • 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
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      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 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
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      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 ...
    • Evaluation of the impact of different SDM switching strategies in a network planning scenario 

      Shariati, Behnam; Sayyad Khodashenas, Pouria; Rivas Moscoso, José Manuel; Ben Ezra, Shalva; Klonidis, Dimitrios; Jiménez, Felipe; Velasco Esteban, Luis Domingo; Tomkos, Ioannis (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
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      We compare SDM joint and independent switching strategies in a planning scenario involving a European backbone network. Joint switching can achieve cost savings of 40-50% with a performance similar to that of independent ...
    • Experimental evaluation and improvement methods for low cost transmitters in long reach PONs 

      Chatzi, Sotiria; Klonidis, Dimitrios; Tsekrekos, Christos P.; Lázaro Villa, José Antonio; Prat Gomà, Josep Joan; Tomkos, Ioannis (2013-12)
      Article
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      In this paper, we first analyze the degradation stochastic resonance (DSR) effect in the context of adaptive averaging (AD-AVG) architectures. The AD-AVG is the adaptive version of the well-known AVG architecture . It is ...
    • High capacity optical networks based on space division multiplexing 

      Behnam Shariati, Mohammad; Comellas Colomé, Jaume; Klonidis, Dimitrios; Velasco Esteban, Luis Domingo; Tomkos, Ioannis (John Wiley & sons, 2017-09-01)
      Part of book or chapter of book
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      This book discusses Elastic Optical Networks (EONs) from an operational perspective. It presents algorithms that are suitable for real-time operation and includes experimental results to further demonstrate the feasibility ...
    • Impact of filter sharpness on the performance of elastic optical networks 

      Sayyad Kodashenas, Pouria; Rivas Moscoso, José Manuel; Klonidis, Dimitrios; Tomkos, Ioannis; Behnam Shariati, Mohammad; Comellas Colomé, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
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      Elastic optical network (EON) technology arises as a promising solution for future high-speed optical transport networks, inasmuch as it can provide superior flexibility and scalability in the spectrum allocation for ...
    • Impact of spatial and spectral granularity on the performance of SDM networks based on spatial superchannel switching 

      Behnam Shariati, Mohammad; Rivas Moscoso, José Manuel; Marom, Dan M.; Ben Ezra, Shalva; Klonidis, Dimitrios; Velasco Esteban, Luis Domingo; Tomkos, Ioannis (2017-07-01)
      Article
      Open Access
      Spatially integrated switching architectures have been recently investigated in an attempt to provide switching capability for networks based on spatial division multiplexing (SDM) fibers, as well as to reduce the ...
    • Investigation of mid-term network migration scenarios comparing multi-band and multifiber deployments 

      Shariati, Behnam; Sayyad Khodashenas, Pouria; Rivas Moscoso, José Manuel; Ben Ezra, Shalva; Klonidis, Dimitrios; Jiménez, Felipe; Velasco Esteban, Luis Domingo; Tomkos, Ioannis (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
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      We compared two different mid-term migration scenarios for core network capacity scaling, realized using either multi-band or multi-fiber systems. We show, under realistic assumptions of current costs, that the multi-fiber ...
    • On the benefits of FMF based data center interconnection utilizing MIMO-less PAM-M transceivers 

      Behnam Shariati, Mohammad; Diamantopoulos, Nikolaos-Panteleimon; Klonidis, Dimitrios; Comellas Colomé, Jaume; Tomkos, Ioannis (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference lecture
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      Space division multiplexing (SDM) has been proposed to cost-effectively increase the capacity of optical transmission systems. The cost savings can be realized by introducing some levels of spatial integration of elements. ...
    • Optical subsystems for next generation access networks 

      Lázaro Villa, José Antonio; Polo Querol, Víctor; Schrenk, Bernhard; Bonada Bo, Francesc; Cano Valadéz, Iván Nicolás; López Pastor, Eduardo Tommy; Kazmierski, Christophe; de Valicourt, Guilhem; Brenot, Romain; Bauwelinck, Johan; Xing-Zhi, Qiu; Ossieur, P.; Forzati, Marco; Rigole, Jean-Pierre; Monroy, I.T; Tangdiongga, E.; Morant, Maryland; Nicolau, L.; Teixeira, A.L.; Erasme, D.; Klonidis, Dimitrios; Tomkos, Ioannis; Prat Gomà, Josep Joan; Kouloumentas,, Christos; Avramopoulos, Hércules (2011)
      Conference report
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      Recent optical technologies are providing higher flexibility to next generation access networks: on the one hand, providing progressive FTTx and specifically FTTH deployment, progressively shortening the copper access ...
    • Options for cost-effective capacity upgrades in backbone optical networks 

      Shariati, Behnam; Rivas Moscoso, José Manuel; Klonidis, Dimitrios; Tomkos, Ioannis; Ben Ezra, Shalva; Jiménez, Felipe; Marom, Dan M.; Sayyad Khodashenas, Pouria; Comellas Colomé, Jaume; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
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      Upgrading the capacity of backbone optical networks while delivering contents to the end-users with a reduced cost per bit is a day-by-day challenge of network operators. In this paper, we first discuss several mid-term ...
    • Simple intradyne PSK system for UDWDM-PON 

      Prat Gomà, Josep Joan; Polo Querol, Víctor; Zakynthinos, P.; Cano Valadéz, Iván Nicolás; Tabares, J.; Fàbrega Sánchez, Josep Maria; Klonidis, Dimitrios; Tomkos, Ioannis (2012-12-17)
      Article
      Open Access
      A homodyne coherent receiver for ultra-dense WDM-PON with off the shelf components is presented. It consists of a conventional DFB, phase switched clock signal, an optical coupler instead of a 90º hybrid, balanced ...
    • Spectrally and spatially flexible optical networks: recent developments and findings 

      Shariati, Mohammad Behnam; Klonidis, Dimitrios; Marom, Dan M.; Comellas Colomé, Jaume; Velasco Esteban, Luis Domingo; Tomkos, Ioannis (Institute of Electrical and Electronics Engineers (IEEE), 2018-09-27)
      Conference report
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      Space division multiplexing (SDM) has been proposed as the ultimate solution to address the capacity crunch of optical transport networks. The efficient utilization of SDM requires some forms of spatial integration which ...
    • 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” ...
    • Test-bed functionality of the SARDANA hybrid NG-PON 

      Prat Gomà, Josep Joan; Polo Querol, Víctor; Lázaro Villa, José Antonio; Bonada, F.; López Pastor, Eduardo Tommy; Schrenk, Bernhard; Omella, M.; Saliou, F.; Le, Q.T.; Chanclou, P.; Leino, D.; Soila, R.; Spirou, S.; Costa, L.; Teixeira, A.; Tosi-Beleffi, G.M.; Klonidis, Dimitrios; Tomkos, Ioannis (2011)
      Conference report
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      The tests with broadband multimedia services of the SARDANA multi-layer prototype prove the feasibility of scalable hybrid DWDM/TDM-PON FTTH networks with resilient optically-integrated ring-trees architecture.
    • Wavelength-tuneable remote node for enhanced resilience and optimization of WDM access networks 

      Lázaro Villa, José Antonio; Bonada Bo, Francesc; Schrenk, Bernhard; Costa, Liliana; Teixeira, Marco Antonio; Chatzi, Sotiria; Klonidis, Dimitrios; Tomkos, Ioannis; Prat Gomà, Josep Joan (IEEE Press. Institute of Electrical and Electronics Engineers, 2011)
      Conference report
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      A remote node design with a wavelength tuneable optical add/drop element is presented and experimentally demonstrated for application in a resilient ring+tree access network architecture. The flexibility of the network ...