The Optical Communications Group (GCO) is part of the Signal Theory and Communications Department (TSC). Our key research areas involve Optical Fiber Technologies, Raman Spectroscopy and High-Speed Networking.

Our experience is related to optical wavelength domain transport and access networks (WDM, HDWDM, SCM), broadband fiber transmission, sources and receivers, all-optical amplification, optical heterodyne detection, wavelength stabilization and monitoring, transparent WDM network architectures and management, optical linear and non-linear distortions, polarization/PMD treatment and network quality monitoring.

The group is integrated in the Advanced Broadband Communications Centre (CCABA) -CCABA is the acronym of ''Centre de Comunicacions Avançades de Banda Ampla''. The CCABA was set up in January 1994 with the aim of consolidating a multi-disciplinary research group: the Integrated Broadband Communications research group, the Optical Communications, the Radio Communications and the Broadband Communications groups. The UPC supports this research centre and its laboratory was partially funded by the Spanish Education Ministry (CICYT) and by Research Commission of the Catalan Government (CIRIT) under several grants. In the EC IV Framework Programme the UPC participated in the Spanish National Host through the network platform of the CCABA.

The GCO laboratories are fully equipped with broadband instrumentation for WDM and high bit rate opto-electronic system design and characterization, as well as long haul fiber link measurements and IP-ATM-SDH-WDM networking.

Pàgina web del Departament

Recent Submissions

  • Enabling multi-tenancy in hybrid optical packet/circuit switched data center networks 

    Peng, Shuping; Nejabati, Reza; Guo, Bingli; Shu, Yan; Zervas, Georgios; Spadaro, Salvatore; Pagès Cruz, Albert; Simeonidou, Dimitra (2014)
    Conference report
    Restricted access - publisher's policy
    In a flattened optical data center network employing hybrid technologies, multi-tenancy is enabled by a new virtual data center embedding method that is equipped with network-aware VM placement exploiting the advanced but ...
  • Experimental validation of active frontend - backend stateful PCE operations in flexgrid optical network re-optimization 

    Martínez, Ricardo; Gifre Renom, Lluís; Casellas Regi, Ramón; Velasco Esteban, Luis Domingo; Muñoz González, Raul; Vilalta, Ricard (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    A PCE-based strategy for LSP re-optimization in flexgrid optical networks is experimentally validated. A front- and back-end stateful PCE architecture is deployed, wherein automatic and coordinated operations (e.g., ...
  • Experimental assessment of an SDN-based control of OPS switching nodes for intra-data center interconnect 

    Agraz Bujan, Fernando; Miao, Wang; Ferrer Delgado, Alejandro; Bernini, Giacomo; Dorren, Harm; Calabretta, Nicola; Ciulli, Nicola; Perelló Muntan, Jordi; Peng, Shuping; Zervas, Georgios; Simeonidou, Dimitra; Junyent Giralt, Gabriel; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    An SDN-based control framework for OPS switches is experimentally assessed. The OpenFlow messages enabling control communication between SDN controller and OPS switch are validated. Dynamic OPS virtual network slices for ...
  • A new flexible ONU design for UDWDM-PON with coherent transceivers and smart activation process 

    Segarra Mullerat, Josep; Sales Zaragoza, Vicente; Prat Gomà, Josep Joan; Pous, R. (2014)
    Conference report
    Restricted access - publisher's policy
    We present a novel ONU architecture for coherent UDWDM-PON with randomly distributed ONU wavelengths. The ONU is built with one or two lasers exhibiting simple limited thermal tunability in a specific optical band, where ...
  • A novel SDN enabled hybrid optical packet/circuit switched data centre network: the LIGHTNESS approach 

    Peng, Shuping; Simeonidou, Dimitra; Zervas, George; Spadaro, Salvatore; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Careglio, Davide; Becerra Fontal, Yolanda; Farreras Esclusa, Montserrat (2014)
    Conference report
    Restricted access - publisher's policy
    Current over-provisioned and multi-tier data centre networks (DCN) deploy rigid control and management platforms, which are not able to accommodate the ever-growing workload driven by the increasing demand of ...
  • Valid inequalities for the routing and spectrum allocation problem in elastic optical networks 

    Klinkowski, Miroslaw; Pioro, Michal; Zotkiewicz, Mateusz; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    We deal with a natural integer-linear programming formulation of the routing and spectrum allocation (RSA) problem in elastic optical networks. We focus on strengthening the formulation with valid inequalities (cuts). For ...
  • L'art de la falsificació 

    Duran Escribà, Xavier; Ruiz Moreno, Sergio (2015-03)
    Article
    Open Access
    La història de l'art és plena de falsificacions. Ja fos una pràctica per aprendre dels mestres o bé per fer diners, l'art de la còpia va seduir tota mena de pintors. Però a mesura que la falsificació s'ha anat perfeccionant, ...
  • An in-operation planning tool architecture for flexgrid network re-optimization 

    Gifre Renom, Lluís; Castro Casales, Alberto; Ruiz Ramírez, Marc; Navarro, Nacho; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    In-operation network planning consists in re-optimizing a network, currently being operated to transport traffic, either minimizing resource utilization or maximizing the transported traffic. In the context of flexgrid ...
  • Impact of transponders and regenerators wake-up time on sleep-mode enabled translucent optical networks 

    Pagès Cruz, Albert; Tornatore, Massimo; Perelló Muntan, Jordi; Spadaro, Salvatore; Morea, Annalisa (2014)
    Conference report
    Restricted access - publisher's policy
    Sleep-mode enabled transponders and regenerators yield to substantial energy savings; however, their non-negligible wake-up time may degrade the network performance. We show that an appropriate dimensioning of the devices ...
  • Enhancing restoration performance using service relocation in PCE-based resilient optical clouds 

    Ahmed, Jawwadd; Monti, Paolo; Wosinska, Lena; Spadaro, Salvatore (2014)
    Conference report
    Restricted access - publisher's policy
    This paper investigates the benefits of dynamic restoration with service relocation in resilient optical clouds. Results from the proposed optimization model show that service availability can be significantly improved ...

View more