Exploració per tema "Optical fibers"

Ara es mostren els items 21-40 de 239

    • Anàlisi de redundància dels nodes d'una xarxa 

      Gomariz Gimena, Gerard (Universitat Politècnica de Catalunya, 2017-01)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Realitzat a/amb:   Xarxa Oberta de Catalunya
      The main goal of this project is to provide redundancy to the nodes of a Network, in this case the Network is owned by Xarxa Oberta de Catalunya. Different aspects will be analyzed with the goal to determine if that node ...

    • Análisis de sistemas de predistorsión para moduladores electroópticos Mach-Zehnder usando el simulador Virtual Photonics Inc. (VPI) 

      Jordà Carmona, Albert (Universitat Politècnica de Catalunya, 2010-02-25)
      Treball Final de Grau
      Accés obert

    • Análisis del despliegue territorial de la fibra óptica en Catalunya 

      Aranda Bodelón, Eva (Universitat Politècnica de Catalunya, 2013-05-29)
      Treball Final de Grau
      Accés obert
      La fibra óptica permite la transmisión de datos mediante la luz que viaja por un medio plástico.Existen diferentes tipologías de fibras ópticas, como monomodo (la señal se propaga en un solomodo) o mutimodo (se propaga en ...

    • Application on minimizing residual AM in DPSK UDWDM-PON ONU by integrated dual-EML 

      Chu Guang, Yong; Cano Valadéz, Iván Nicolás; Polo Querol, Víctor; Prat, Josep (2016-06-01)
      Article
      Accés obert
      A monolithically integrated dual electroabsorption modulated laser (DEML), consisting of distributed feedback laser (DFB) and electroabsorption modulator (EAM) sections, is proposed as a transmitter in an optical network ...

    • Applying cognitive dynamic learning strategies for margins reduction in operational optical networks 

      Notivol Calleja, Luis David; Spadaro, Salvatore; Perelló Muntan, Jordi; Junyent Giralt, Gabriel (2020-09-01)
      Article
      Accés obert
      Today's optical transport networks are complex already and the support of the new arising services will further increase such complexity. Traditional deterministic network procedures will need to be revisited, especially ...

    • Applying data visualization for failure localization 

      Vela, Alba P.; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Data visualization is applied to BER measures in a bigdata repository. Bubble charts are produced to identify lightpaths with increasing BER and spectrum color maps are then used to identify the most likely degraded link

    • Autonomic NFV network services on top of disaggregated optical metro networks 

      Esmenats, P. R.; Casellas Regi, Ramon; Gifre Renom, Lluís; Pérez Vela, Alba; Ruiz Ramírez, Marc; Martínez, Ricardo; Velasco Esteban, Luis Domingo (2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Control and orchestration of metro network to support dynamic provisioning and reconfiguration of services based on Virtual Network Functions are demonstrated through a CDN example. Interaction among CASTOR MDA, OSM and ...

    • Big data analytics in support of virtual network topology adaptability 

      Gifre Renom, Lluís; Contreras, Luis Miguel; López Álvarez, Victor; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      ABNO's OAM Handler is extended with big data analytics capabilities to anticipate traffic changes in volume and direction. Predicted traffic is used as input for VNT re-optimization. Experimental assessment is realized on ...

    • Cancelación del ruido AM en sistemas de transmisión coherentes por fibra óptica: receptor balanceado 

      Ruiz Boqué, Sílvia; Junyent Giralt, Gabriel (Institución ferial de Madrid (IFEMA), 1988)
      Text en actes de congrés
      Accés obert
      In this work the authors have studied the AM noise influence over coherent transmission systems employing heterodyne-type detection. A dual-detector optical heterodyne receiver is also studied in arder to eliminate the LO ...

    • Capacity quantification of joint-switching-enabled flex- grid/SDM optical backbone networks 

      Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Spadaro, Salvatore (Optical Society of American (OSA), 2017)
      Text en actes de congrés
      Accés obert
      We quantify the network capacity scaling from 7 to 30 spatial channels. While multifiber provides a 5x capacity increase, MCF limits it to 4x and 2x in national and continental backbone networks, respectively.

    • Caracterización estadística del amplificador óptico semiconductor aplicado en un enlace digital por fibra óptica 

      Ruiz Moreno, Sergio; Junyent Giralt, Gabriel (Consejo Superior de Investigaciones Científicas (CSIC), 1986)
      Text en actes de congrés
      Accés obert
      In this paper an statistical model for the semiconductor optical amplifier CSLA) working in linear regime is developped. This model, based on the STT theory, allows the calculation of any number of moments of the statistical ...

    • CASTOR: An architecture to bring cognition to transport networks 

      Velasco Esteban, Luis Domingo; Gifre Renom, Lluís; Izquierdo Zaragoza, José Luis; Julián Moreno, Guillermo; López de Vergara Méndez, Jorge E. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      CASTOR architecture to enable cognitive networking is demonstrated. Extended nodes make local decisions, whilst a centralized system beside the network controller makes network-wide decisions. Interaction with ONOS, Net2Plan, ...

    • 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
      Accés obert
      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 ...

    • Coherent ultra-dense WDM-PON enabled by complexity-reduced digital transceivers 

      Tabares Giraldo, Jeison; Ghasemi, Saeed; Velásquez Micolta, Juan Camilo; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2020-03-15)
      Article
      Accés obert
      Coherent technologies, along with digital signal processing (DSP), have revolutionized optical communication systems, significantly increasing the capacity of the fiber channel owing to transmission of advanced modulation ...

    • Colorless FDMA-PON with flexible bandwidth allocation and colorless, low-speed ONUs [invited] 

      Schindler, Philipp C.; Schmogrow, Rene M.; Dreschmann, Michael; Meyer, Joachim; Tomkos, Ioannis; Prat Gomà, Josep Joan; Krimmel, Heinz-Georg; Pfeiffer, Thomas; Kourtessis, Pandelis; Ludwig, A.; Karnick, D.; Hillerkuss, David; Becker, Juergen; Koos, Christian; Freude, Wolfgang; Leuthold, Juerg (Institute of Electrical and Electronics Engineers (IEEE), 2013-10)
      Article
      Accés restringit per política de l'editorial
      We demonstrate a remotely seeded flexible passive optical network (PON) with multiple low-speed subscribers but only a single optical line terminal transceiver operating at a data rate of 31.25 Gbits/s. The scheme is based ...

    • Control de la polarització de la llum en una xarxa WDM-PON 

      Blanco Benítez, Juan (Universitat Politècnica de Catalunya, 2015-07)
      Projecte/Treball Final de Carrera
      Accés obert
      Study of control and compensation of the distorion in polarization, introduced by the birefringence of a fiber in a WDM-PON net.

    • Core VNT adaptation based on the aggregated metro-flow traffic model prediction 

      Morales Alcaide, Fernando; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Optical Society of American (OSA), 2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Aggregation of metro-flow traffic models is proposed to obtain valid core traffic predictive models for core VNT reconfiguration when metro and core networks are independently controlled. Exhaustive simulation results ...

    • Damage detection in composite materials structures under variable loads conditions by using fiber Bragg gratings and principal component analysis, involving new unfolding and scaling methods 

      Sierra Pérez, Julian; Güemes Gordo, Alfredo; Mujica Delgado, Luis Eduardo; Ruiz Ordóñez, Magda (2014-06-03)
      Article
      Accés restringit per política de l'editorial
      An innovative methodology based on the use of fiber Bragg gratings as strain sensors and strain field pattern recognition is proposed for damage detection in composite materials structures. The strain field pattern recognition ...

    • Data transmission through Radio over Fiber Links 

      Zaragosin Bautista, Edison Gabriel (Universitat Politècnica de Catalunya, 2023-02-02)
      Treball Final de Grau
      Accés obert
      This document explains the principle of operation and implementation, via software, of a RoF system and how to assemble the radio frequency part through laboratory equipment.

    • Degradation detection and severity estimation by exploiting an optical time and frequency digital twin 

      Devigili, Mariano; Ruiz Ramírez, Marc; Barzegar, Sima; Costa, Nelson; Napoli, Antonio; Pedro, João; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Text en actes de congrés
      Accés obert
      We exploit the intrinsic advantages of a time and frequency domain digital twin to detect degradations and to estimate their severity. Noticeable performance shown for filter failures confirms the usefulness of this approach.