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

  • Design of flexible udWDM metro-access network devices assisted by high resolution complex spectroscopy 

    Altabas, Jose Antonio; Izquierdo, David; Pascual, Álvaro; Sarmiento Hernández, Samael; Lázaro Villa, José Antonio; Garces, Ignacio; Villafranca, A. (2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The new cloud services, the Internet of Things (IoT) and the convergence of mobile and optical networks in the 5G scenario are pushing up the traffic demand over the metro-access networks. Flexible ultra-dense Wavelength ...
  • Multilevel direct DFB phase modulation in 6.25 GHz spectrally spaced UDWDM PONs 

    Cano Valadez, Iván Nicolás; Velásquez Micolta, Juan Camilo; Polo Querol, Víctor; Prat Tasias, Jordi (2016)
    Presentació
    Accés restringit per política de l'editorial
    Direct phase modulation of DFB is demonstrated with DPSK, DQPSK and Duobinary modulation formats and detected with an intradyne receiver based on a 120-degree hybrid. The system is tested in a 50 km fibre link with 6.25 ...
  • Soft and hard modelling methods for decovolution of mixtures of Raman spectra for pigment analysis: a qualitative and quantitative approach 

    Coma, L; Breitman Mansilla, Mónica Celia; Ruiz Moreno, Sergio (2000-01)
    Article
    Accés restringit per política de l'editorial
    Raman spectroscopy provides a means for the detection and identification of pictorial materials on artworks. As a non-destructive, applicable in situ and non-ambiguous technique, it is one of the most preferred to analyse ...
  • Evaluating the energy efficiency of DWA algorithms in UDWDM-PONs 

    Segarra Mullerat, Josep; Sales Zaragoza, Vicente; Polo Querol, Víctor; Prat Gomà, Josep Joan (2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Ultra-Dense Wavelength Division Multiplexing (UDWDM) has been proposed for the optical access Passive Optical Network (PON) in the COst-effective COhereNt Ultra-dense-WDM-PON for lambda-To-the-user access (COCONUT) ...
  • Transparent supervision of optically amplified fibre links with received signal and ASE monitoring 

    Prat Gomà, Josep Joan; Ruiz Moreno, Sergio (2000-09)
    Article
    Accés restringit per política de l'editorial
    This paper illustrates that remote fault localisation in all-optical links with concatenated fibre amplifiers can be performed by simple monitoring of the signal and the accumulated ASE noise powers at the receiver end. ...
  • Performance monitor for all-optical networks based on homodyne spectroscopy 

    Amrani, A.; Junyent Giralt, Gabriel; Prat Gomà, Josep Joan; Comellas Colomé, Jaume; Ramdani, I.; Sales Zaragoza, Vicente; Rafel, A. (2000-11)
    Article
    Accés obert
    The ability to transparently detect performance degradations in all-optical networks is highly desirable. We present an optical signal monitor, based on a frequency supervision system, which can participate in some tasks ...
  • Dispersion-shifted fiber polarization scrambler based on faraday effect 

    Prat Gomà, Josep Joan; Comellas Colomé, Jaume (1999-07)
    Article
    Accés obert
    Demonstration of an all-fiber polarization scrambler based on the Faraday effect is carried out. The device has been constructed using dispersion-shifted fiber that has a major tolerance to bends than standard single-mode ...
  • Limitation to wdm transmission distance due to cross-phase modulation induced spectral broadening in dispersion compensated standard fiber systems 

    Mikhailov, V; Killey, R I; Prat Gomà, Josep Joan; Bayvel, P (1999-08)
    Article
    Accés obert
    We describe large spectral broadening due to the interaction of cross-phase modulation/self-phase modulation and fiber dispersion, and explain its contribution to the penalties in standard fiber systems pre- and postcompensated ...
  • Electronic and photonic switching in the atm era 

    Masip, J; Solé Pareta, Josep; Junyent Giralt, Gabriel (1998-09)
    Article
    Accés obert
    Broadband networks require high-capacity switches in order to properly manage large amounts of traffic fluxes. Electronic and photonic technologies are being used to achieve this objective both allowing different multiplexing ...
  • Minimum channel spacing in an ofdm cpfsk optical coherent system 

    Prat Gomà, Josep Joan; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (1998-03)
    Article
    Accés restringit per política de l'editorial
    Channel spacing in optical frequency-division multiplexed (OFDM) coherent optical systems with continuous-phase frequency-shift-keying (CPFSK) is obtained both theoretically and experimentally. The bit error ratio is derived ...

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