Enviaments recents

  • Solving large instances of the RSA problem in flexgrid elastic optical networks 

    Walkowiak, Krzysztof; Zotkiewicz, Mateusz; Klinkowski, Miroslaw; Pioro, Michal; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2016-05-01)
    Article
    Accés obert
    We present an optimization procedure that mixes advanced large-scale optimization methods and heuristics to solve large instances (with over 1.7 million integer variables) of the routing and spectrum allocation (RSA) ...
  • Automatic morphology-based cubic p-spline fitting methodology for smoothing and baseline-removal of Raman spectra 

    González-Vidal, Juan José; Pérez Pueyo, Rosanna; Soneira Ferrando, M. José (2017-01-01)
    Article
    Accés restringit per política de l'editorial
    Noise filtering is considered a crucial step for the proper interpretation of Raman spectra. In this work, we present a new denoising procedure which enhances the Raman information whilst reducing unwanted contributions ...
  • First demonstration and field trial on multi-user UDWDM-PON full duplex PSK-PSK with single monolithic integrated dual-output-DFB-SOA based ONUs 

    Chu, Guang Yong; Maho, Anaelle; Cano Valadez, Iván Nicolás; Polo Querol, Víctor; Brenot, Romain; Debregeas, Helene; Prat Gomà, Josep Joan (2016-10-15)
    Article
    Accés obert
    We demonstrate a monolithically integrated dual-output DFB-SOA, and conduct the field trial on a multi-user bidirectional coherent ultradense wavelength division multiplexing-passive optical network (UDWDM-PON). To the ...
  • Optimal VDC service provisioning in optically interconnected disaggregated data centers 

    Pagès Cruz, Albert; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Spadaro, Salvatore (2016-07)
    Article
    Accés obert
    Virtual data center (VDC) is a key service in modern data center (DC) infrastructures. However, the rigid architecture of traditional servers inside DCs may lead to blocking situations when deploying VDC instances. To ...
  • 1Gbps full-duplex links for ultra-dense-WDM 6.25GHz frequency slots in optical metro-access networks 

    Altabas, Jose Antonio; Izquierdo, David; Lázaro Villa, José Antonio; Lerin, Adolfo; Sotelo, Félix; Garces, Ignacio (2016-01-11)
    Article
    Accés obert
    1Gbps full-duplex optical links for 6.25GHz ultra dense WDM frequency slots are demonstrated and optimized for cost-effective metro-access networks. The OLT-ONU downlinks are based on 1Gbps Nyquist-DPSK using MZM and ...
  • Coherent ONU based on 850 µm-long cavity-RSOA for next-generation ultra-dense access network 

    Chu, Guang Yong; Lerin, Adolfo; Cano Valadez, Iván Nicolás; Polo Querol, Víctor; Prat, Josep (2016-05-10)
    Article
    Accés obert
    In this Letter, an efficient bidirectional differential phase-shift keying (DPSK)-DPSK transmission for a ultradense wavelength division-multiplexed passive optical network is proposed. A single distributed feedback laser ...
  • 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. ...

Mostra'n més