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

  • Greenfield gradual migration planning toward spectrally-spatially flexible optical networks 

    Lechowicz, Piotr; Goscien, Roza; Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Spadaro, Salvatore; Walkowiak, Krzysztof (2019-10-01)
    Article
    Open Access
    This article identifies the unavoidably required upgrade of short-term realizable elastic optical networks (EONs) operating over single-mode fibers toward spectrally-spatially flexible optical networks (SS-FONs), exploiting ...
  • Knowledge management in optical networks: architecture, methods, and use cases [Invited] 

    Ruiz Ramírez, Marc; Tabatabaeimehr, Fatemehsadat; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2020-01-01)
    Article
    Restricted access - publisher's policy
    Autonomous network operation realized by means of control loops, where prediction from machine learning (ML) models is used as input to proactively reconfigure individual optical devices or the whole optical network, has ...
  • Near real-time estimation of end-to-end performance in converged fixed-mobile networks 

    Bernal Escribano, Álvaro; Richart, Matías; Ruiz Ramírez, Marc; Castro Casales, Alberto; Velasco Esteban, Luis Domingo (Elsevier, 2020-01-15)
    Article
    Restricted access - publisher's policy
    The independent operation of mobile and fixed network segments is one of the main barriers that prevents improving network performance while reducing capital expenditures coming from overprovisioning. In particular, a ...
  • Differential 8-APSK monolithically integrated dual-EML transmitter for flexible coherent PONs 

    Velásquez Micolta, Juan Camilo; Tabares Giraldo, Jeison; Prat Gomà, Josep Joan (2019-06-01)
    Article
    Restricted access - publisher's policy
    We experimentally demonstrate a simultaneous amplitude and phase modulation of a monolithically integrated dual electro-absorption modulated laser. The proposed technique combines a 4-ary direct phase modulation with a ...
  • Experimental assessment of 10 Gbps 5G multicarrier waveforms for high-layer split U-DWDM-PON-based fronthaul 

    Sarmiento Hernández, Samael; Altabas, Jose Antonio; Spadaro, Salvatore; Lázaro Villa, José Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2019-05-15)
    Article
    Open Access
    The current constant growth in mobile networks' traffic demands caused by the popularization of cloud and streaming services on personal devices, requires architectural changes so as to fulfill all new 5G mobile network ...
  • Orchestrating virtual slices in data centre infrastructures with optical DCN 

    Pagès Cruz, Albert; Agraz Bujan, Fernando; Montero Herrera, Rafael; Landi, Giada; Capitani, Marco; Gallico, Domenico; Biancani, Matteo; Nejabati, Reza; Simeonidou, Dimitra; Spadaro, Salvatore (2019-07-01)
    Article
    Restricted access - publisher's policy
    The emergence of new paradigms and services is pushing the limits of nowadays cloud infrastructures. It is a fact that current solutions lack in the flexibility and configurability to adapt to heterogeneous requirements ...
  • Enable advanced QoS-aware network slicing in 5G networks for slice-based media use cases 

    Wang, Qi; Alcaraz Calero, Jose; Ricart Sánchez, Rubén; Barros Weiss, Maria; Spadaro, Salvatore (2019-01-01)
    Article
    Open Access
    Media use cases for emergency services require mission-critical levels of reliability for the delivery of media-rich services, such as video streaming. With the upcoming deployment of the fifth generation (5G) networks, a ...
  • Supporting QoE/QoS-aware end-to-end network slicing in future 5G-enabled optical networks 

    Montero, Rafael; Pagès Cruz, Albert; Agraz Bujan, Fernando; Spadaro, Salvatore (2019)
    Conference report
    Restricted access - publisher's policy
    Network slicing with Quality of Experience/Quality of Service (QoE/QoS) guarantees is seen as one of the key enablers of future 5G networks. Nevertheless, it poses several challenges in both resource provisioning and ...
  • Versatile metro-access network integrating FTTH, enterprises, IoT and 5G services 

    Segarra Mullerat, Josep; Sales Zaragozá, Vicente; Prat Gomà, Josep Joan (2019)
    Conference report
    Restricted access - publisher's policy
    Bandwidth demands are increasing with a high dynamic shape, driven by high definition video, cloudcomputing, business services, Internet of Things (IoT) and emerging next generation mobile networks like 5G. To support this ...
  • A universal specification for multicore fiber crosstalk 

    Gené Bernaus, Joan M.; Winzer, Peter J. (2019-05-01)
    Article
    Open Access
    In order to transition multi-core fiber (MCF) technologies from their research state to volume production, the key design specifications have to be broadly agreed upon, first and foremost an acceptable level of inter-core ...
  • Out-of-field generic ML training with in-field specific adaptation to facilitate ML deployments 

    Shariati, Mohammad Behnam; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Conference report
    Open Access
    A two-phase strategy to facilitate ML algorithm deployment in real networks is demonstrated: out-of-field training uses data from simulation and testbed experiments with generic equipment whereas in-field adaptation is ...
  • Optical signal tracking for robust PAM4 deployment in filterless metro network scenarios 

    Shariati, Mohammad Behnam; Fresi, Francesco; Ruiz Ramírez, Marc; Cugini, Filippo; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Conference report
    Open Access
    Highly accurate and reliable optical signal tracking is proposed that estimates sub-GHz laser drift failures by analyzing spectra acquired by cost-effective coarse-granular OSAs. Its application on PAM4 systems in filterless ...

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