Now showing items 1-20 of 506

    • 1Gbps full-duplex 5GHz frequency slots uDWDM flexible metro/access networks based on VCSEL-RSOA transceiver 

      Altabas, Jose Antonio; Izquierdo, David; Lázaro Villa, José Antonio; Garces, Ignacio (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      1Gbps full-duplex 5GHz frequency slot is proposed for uDWDM Flexible Metro-Access Networks. The costeffective ONU transceiver is based on VCSEL as LO for coherent reception and seed for phase-modulated RSOA, providing ...
    • 201. Arquitectura dimunita 

      Universitat Politècnica de Catalunya. Rectorat (Oficina de comunicació i relació amb els mitjans, 2007-10)
      Article
      Open Access
    • A QoS-Aware Dynamic Bandwidth Allocation algorithm for passive optical networks with non-zero laser tuning time 

      Zehri, Mohammad Habib; Haastrup, Adebanjo; Rincón Rivera, David; Piney da Silva, José Ramón; Sallent Ribes, Sebastián; Bazzi, Ali (2021-05-10)
      Article
      Open Access
      The deployment of new 5G services and future demands for 6G make it necessary to increase the performance of access networks. This challenge has prompted the development of new standardization proposals for Passive Optical ...
    • A two dimensional KTiOPO4 photonic crystal grown using a macroporous silicon template 

      Peña Revellez, Alexandra; Finizio, Sergio Di; Todorov Trifonov, Trifon; Carvajal, Joan Josep; Aguiló Díaz, Magdalena; Pallarès Marzal, Josep; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Marsal Garví, Lluís Francesc; Diaz, Francesc; Martorell Pena, Jordi (2006-09)
      Article
      Restricted access - publisher's policy
      2D KTiOPO4 photonic crystals are fabricated using a silicon membrane of air holes as a template. Columns of KTiOPO4 are grown by liquid-phase epitaxy from a substrate into such air holes. The crystallographic orientation ...
    • Activitats del Grup de Recerca en Dinàmica no lineal, Òptica no lineal i Làsers (DONLL)" 

      Vilaseca Alavedra, Ramon (Campus de Terrassa de la UPC, 2013-06-13)
      Conference report
      Open Access
    • Adiabatic Processes Realized with a Trapped Brownian Particle 

      Martínez, Ignacio A.; Roldán, Édgar; Dinis, Luis; Petrov, Dmitri; Rica, Raúl A. (APS Physics, 2015-03-27)
      Article
      Open Access
      The ability to implement adiabatic processes in the mesoscale is of key importance in the study of artificial or biological micro- and nanoengines. Microadiabatic processes have been elusive to experimental implementation ...
    • Al2O3/TiO2 inverse opals from electrosprayed self-assembled templates 

      Coll, Arnau; Bermejo Broto, Sandra; Hernández, David; Castañer Muñoz, Luis María (2018-01-19)
      Article
      Open Access
      The fabrication of high optical quality inverse opals is challenging, requiring large size, three-dimensional ordered layers of high dielectric constant ratio. In this article, alumina/TiO2–air inverse opals with a 98.2% ...
    • Algebraic bright and vortex solitons in defocusing media 

      Borovkova, Olga V.; Kartashov, Yaroslav V.; Malomed, Boris A.; Torner Sabata, Lluís (2011-08-15)
      Article
      Restricted access - publisher's policy
      We demonstrate that spatially inhomogeneous defocusing nonlinear landscapes with the nonlinearity coefficient growing toward the periphery as (1+|¿|¿) support one- and two-dimensional fundamental and higher-order bright ...
    • All optical manipulation of a single nitrogen-vacancy centre in nanodiamond 

      Geiselmann, Michael Wolfgang (Universitat Politècnica de Catalunya, 2014-04-10)
      Doctoral thesis
      Open Access
      The efficient interaction of photons with single quantum emitters like nitrogen vacancy (NV) centres is essential for the elaboration of future integrated quantum optical devices. A promising strategy towards this goal ...
    • An ultra-compact particle size analyser using a CMOS image sensor and machine learning 

      Hussain, Rubaiya; Martinez Cordero, Pedro Antonio; Coll, T.; Pruneri, Valerio (2020-12)
      Article
      Open Access
      Light scattering is a fundamental property that can be exploited to create essential devices such as particle analysers. The most common particle size analyser relies on measuring the angle-dependent diffracted light from ...
    • Analysis of photonic band gaps in two-dimensional photonic crystals with rods covered by a thin interfacial layer 

      Todorov Trifonov, Trifon; Marsal, L F; Rodríguez Martínez, Ángel; Pallarès Marzal, Josep; Alcubilla González, Ramón (2004-11)
      Article
      Restricted access - publisher's policy
      We investigate different aspects of the absolute photonic band gap (PBG) formation in two-dimensional photonic structures consisting of rods covered with a thin dielectric film. Specifically, triangular and honeycomb ...
    • Anderson cross-localization 

      Stützer, Simon; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Tünnermann, A.; Nolte, Stefan; Lewenstein, Maciej; Torner Sabata, Lluís; Szameit, Alexander (2012)
      Article
      Restricted access - publisher's policy
      We report Anderson localization in two-dimensional optical waveguide arrays with disorder in waveguide separation introduced along one axis of the array, in an uncorrelated fashion for each waveguide row. We show that the ...
    • Anderson localization in Bragg-guiding arrays with negative defects 

      Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2012-10)
      Article
      Restricted access - publisher's policy
      We show that Anderson localization is possible in waveguide arrays with periodically spaced defect waveguides having a lower refractive index. Such localization is mediated by Bragg reflection, and it takes place even if ...
    • Anderson localization of light with topological dislocations 

      Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2013-11-01)
      Article
      Open Access
      We predict Anderson localization of light with nested screw topological dislocations propagating in disordered two-dimensional arrays of hollow waveguides illuminated by vortex beams. The phenomenon manifests itself in the ...
    • Angular surface slitons in sectorial hexagonal arrays 

      Szameit, Alexander; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Heinrich, Matthias; Dreisow, Felix; Pertsch, T; Nolte, Stefan; Tünnermann, A; Lederer, F; Torner Sabata, Lluís (2008-07)
      Article
      Restricted access - publisher's policy
      We report on the experimental observation of corner surface solitons localized at the edges joining planar interfaces of hexagonal waveguide array with uniform nonlinear medium. The face angle between these interfaces has ...
    • Aplicació de la fotònica en l’oftalmologia 

      Boqué Estil·les, Glòria (Universitat Politècnica de Catalunya, 2021-02-01)
      Bachelor thesis
      Restricted access - author's decision
      La detecció a temps de les malalties oculars és essencial per poder actuar i evitar la pèrdua de visió. Algunes d’aquestes patologies estan associades a la pèrdua de fotoreceptors de la retina. És per aquest motiu que la ...
    • Area and laser power scalability analysis in photonic networks-on-chip 

      Abadal Cavallé, Sergi; Cabellos Aparicio, Alberto; Lázaro Villa, José Antonio; Nemirovsky, Mario; Alarcón Cot, Eduardo José; Solé Pareta, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference lecture
      Restricted access - publisher's policy
      In the last decade, the field of microprocessor architecture has seen the rise of multicore processors, which consist of the interconnection of a set of independent processing units or cores in the same chip. As the number ...
    • Arresting wave collapse by wave self-rectification 

      Crasovan, L C; Pérez Torres, Juan; Mihalache, Dumitru; Torner Sabata, Lluís (2003-08)
      Article
      Restricted access - publisher's policy
      We put forward a mechanism for tailoring, and even arresting, the collapse of wave packets in nonlinear media, whose dynamics is governed by nonlocal two-dimensional nonlinear Schrödinger-like equations. The key ingredient ...
    • Assessment of sea-motion influence on wind vector retrieval and atmospheric stability estimation by Doppler Wind Lidar 

      Farré Guarné, Joan (Universitat Politècnica de Catalunya, 2021-07-06)
      Bachelor thesis
      Restricted access - publisher's policy
      In the context of offshore wind energy, LIDAR technology is emerging with the use of floating Doppler Wind Lidars. These offshore devices have arisen as an alternative to traditional meteorological masts in the wind resource ...
    • Asymmetric light transmission in PT-Symmetric microring resonators 

      Giden, I.; Dadashi, Kh.; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis; Kurt, Hamza (2016-03-15)
      Article
      Restricted access - publisher's policy
      We propose a new type of add-drop microring resonator made of gain and loss materials. Microring resonators are compact, narrow band, and optical channel dropping filters. In such linear systems, light transmission to ...