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

  • Introduction to the ONDM2020 special issue 

    Casellas Regi, Ramon; Muñoz, Raul; Furdek, Marija; Spadaro, Salvatore; Zhu, Zuqing (Institute of Electrical and Electronics Engineers (IEEE), 2021-06-01)
    Article
    Open Access
    This JOCN special issue includes extended versions of selected papers that were presented at the 24th International Conference on Optical Network Design and Modeling (ONDM2020), which took place virtually on May 18–21, ...
  • Results and achievements of the ALLIANCE Project: New network solutions for 5G and beyond 

    Careglio, Davide; Spadaro, Salvatore; Cabellos Aparicio, Alberto; Lázaro Villa, José Antonio; Barlet Ros, Pere; Gené Bernaus, Joan M.; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Suárez-Varela Maciá, José Rafael; Pagès Raventós, Albert; Paillissé Vilanova, Jordi; Almasan Puscas, Felician Paul; Domingo Pascual, Jordi; Solé Pareta, Josep (Multidisciplinary Digital Publishing Institute, 2021-09-30)
    Article
    Open Access
    Leaving the current 4th generation of mobile communications behind, 5G will represent a disruptive paradigm shift integrating 5G Radio Access Networks (RANs), ultra-high-capacity access/metro/core optical networks, and ...
  • Quality of perception prediction in 5G slices for e-Health services using user-perceived QoS 

    Slimen, Yosra Ben; Balcerzak, Joanna; Pagès Cruz, Albert; Agraz Bujan, Fernando; Spadaro, Salvatore; Koutsopoulos, Konstantinos; Al-Bado, Mustafa; Truong, Thuy; Giardina, Pietro G.; Bernini, Giacomo (Elsevier, 2021-10-01)
    Article
    Restricted access - publisher's policy
    In order to compete for a prominent market share, network operators and service providers should retain and increase the verticals’ subscription, catering to their needs in order to differentiate themselves from competitors. ...
  • Soft failure detection, localization, identification, and severity prediction by estimating QoT model input parameters 

    Barzegar, Sima; Ruiz Ramírez, Marc; Sgambelluri, Andrea; Cugini, Filippo; Napoli, Antonio; Velasco Esteban, Luis Domingo (2021-09)
    Article
    Open Access
    The performance of optical devices can degrade because of aging and external causes like, for example, temperature variations. Such degradation might start with a low impact on the Quality of Transmission (QoT) of the ...
  • A multicast routing scheme for the Internet: simulation and experimentation in large-scale networks 

    Careglio, Davide; Agraz Bujan, Fernando; Papadimitriou, Dimitri (Multidisciplinary Digital Publishing Institute, 2021-09-17)
    Article
    Open Access
    With the globalisation of the multimedia entertainment industry and the popularity of streaming and content services, multicast routing is (re-)gaining interest as a bandwidth saving technique. In the 1990’s, multicast ...
  • Coherent UD-WDM RoF Fronthaul network with D-EML transmitter and phase-noise robust receiver 

    Masanas Jiménez, Miquel; Tabares Giraldo, Jeison; Prat Gomà, Josep Joan (2021-12-01)
    Article
    Open Access
    This work proposes and tests a simplified coherent uplink architecture for ultra-dense coherent analog mobile Fronthaul with phase noise cancellation based on single sideband modulation of a dual-EML. Results show optical ...
  • Rayleigh backscattering rejection in single-laser homodyne transceiver for UD-WDM using λ-Shifting 

    Masanas Jiménez, Miquel; Santos Blanco, M. Concepción; Tabares Giraldo, Jeison; Polo Querol, Víctor; Prat Gomà, Josep Joan (2021-04-01)
    Article
    Open Access
    With the aim of using a single laser per transceiver in single fiber splitter-based passive optical networks (PON) with coherent homodyne receivers, we apply wavelength shifting in an ultra-dense wavelength division ...
  • Impact of multi-vendor transponders performance on design margin in optical networks 

    Mahajan, Ankush; Christodoulopoulos, Konstantinos; Martínez, Ricardo; Muñoz, Raul; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2021-01-01)
    Article
    Open Access
    For reliable and efficient network planning and operation, accurate estimation of Quality of Transmission (QoT) is necessary. In optical networks, a physical layer model (PLM) is typically used as a QoT estimation tool ...
  • Cooperative learning for disaggregated delay modeling in multidomain networks 

    Tabatabaeimehr, Fatemehsadat; Ruiz Ramírez, Marc; Proietti, Roberto; Velasco Esteban, Luis Domingo; Liu, Che-Yu; Chen, Xiaoliang; Ben Yoo, S. J. (2021-05-05)
    Article
    Open Access
    Accurate delay estimation is one of the enablers of future network connectivity services, as it facilitates the application layer to anticipate network performance. If such connectivity services require isolation (slicing), ...
  • Experimental demonstration of widely tunable rate/reach adaptation from 80 km to 12,000 km using probabilistic constellation shaping 

    Gené Bernaus, Joan M.; Chen, Xi; Cho, Junho; Chandrasekhar, Sethumadhavan; Winzer, Peter (2020)
    Conference report
    Open Access
    We experimentally demonstrate the rate/reach adaptability of probabilistically constellation-shaped quadrature amplitude modulation across from 80 km to 12,000 km using the same 32-GBaud transponder hardware and highlight ...
  • On the benefits of probabilistic constellation shaping in Flex-Grid/MCF dynamic optical backbone networks 

    Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    Conference report
    Open Access
    In this paper, we propose a novel methodology for estimating the worst-case spectral efficiency (b/s/Hz) of end-to-end paths across a Multi-Core Fiber (MCF)-enabled Flex-Grid optical network, accounting for physical link ...
  • Adaptive and iterative QoT estimator retraining for launch power optimization 

    Mahajan, Ankush; Christodoulopoulos, Konstantinos; Martínez Rivera, Ricardo Victor; Muñoz González, Raül; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    Conference report
    Open Access
    We dynamically optimize the transponders launch powers with iterative closed control loops. We close the loop after an adaptable number of algorithm’s intermediate calculations, to monitor and retrain the QoT estimator ...

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