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

Enviaments recents

  • 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
    Accés obert
    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” ...
  • Automatic classification system of Raman spectra applied to pigments analysis 

    González Vidal, Juan José; Pérez Pueyo, Rosanna; Soneira Ferrando, M. José (2016-12-01)
    Article
    Accés obert
    Raman spectroscopy is one of the few non-destructive techniques capable of identifying pigments in art works. Raman spectra contain powerful information that can be used to identify unknown compounds and their chemical ...
  • Cost-effective transceiver based on an RSOA and a VCSEL for flexible uDWDM networks 

    Altabas, Jose Antonio; Izquierdo, David; Lázaro Villa, José Antonio; Garces, Ignacio (2016-05-15)
    Article
    Accés obert
    A cost-effective transceiver for a 1-Gb/s full-duplex ultra-dense wavelength division multiplexing optical link is proposed for flexible metro-access and 5G networks. The transceiver is based on a vertical cavity surface ...
  • UDWDM-PON using low-cost coherent transceivers with limited tunability and heuristic DWA 

    Sales Zaragoza, Vicente; Segarra Mullerat, Josep; Polo Querol, Víctor; Velásquez Micolta, Juan Camilo; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2016-08-01)
    Article
    Accés obert
    A new Passive Optical Network (PON) for access, making use of Ultra Dense Wavelength Division Multiplexing (UDWDM) by densely spacing channels at few GHz, and introducing the “wavelength-to-the-user” concept, is proposed. ...
  • Chirp-based direct phase modulation of VCSELs for cost-effective transceivers 

    Altabas, Jose Antonio; Izquierdo, David; Lázaro Villa, José Antonio; Garces, Ignacio (2017-02-01)
    Article
    Accés restringit per política de l'editorial
    A 2.5Gb/s DPSK transmitter based on direct phase modulation of a VCSEL using its own chirp is proposed. The VCSEL, which wavelength is 1539.84nm, has been characterized both static and dynamically. The sensitivity of a ...
  • 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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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.
  • 7.5 Gb/s direct DFB phase modulation with 8-DPSK for 6.25 GHz spaced coherent UDWDM-PONs 

    Cano Valadez, Iván Nicolás; Velásquez Micolta, Juan Camilo; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    We demonstrate an 8-DPSK directly phase-modulated DFB with intradyne detection in a 50 km, 6.25 GHz channel spaced UDWDM-PON. A bit rate of 7.5 Gb/s is achieved with Rx sensitivity of -31 dBm at BER=10-3.
  • Ultrafast wavelength jumping and wavelength adjustment with low current using monolithically integrated FML for long-reach UDWDM-PON 

    Chu, Guang Yong; Prat Gomà, Josep Joan (2016-12-07)
    Article
    Accés obert
    Ultrafast wavelength jumping at optical network units (ONUs) for an access network with frequency modulated lasers (FMLs) is demonstrated. This FML consists of an intracavity tunable phase section and filtering gain section. ...
  • Dynamic virtual network connectivity services to support C-RAN backhauling 

    Asensio García, Adrián; Ruiz Ramírez, Marc; Contreras Murillo, Luis Miguel; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2016-12-01)
    Article
    Accés restringit per política de l'editorial
    Aiming at satisfying in a cost-effective manner the forecast traffic growth that future mobile networks will need to support, traditional distributed Radio Access Networks (RANs) are evolving towards centralized architectures. ...
  • Virtual network topology reconfiguration based on big data analytics for traffic prediction 

    Morales Alcaide, Fernando; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (OSA, 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Big data analytics is applied for IP traffic prediction. When the virtual topology needs to be reconfigured, predicted and current traffic matrices are used to find the optimal topology. Exhaustive simulation results reveal ...

Mostra'n més