Ara es mostren els items 1-20 de 21

  • Architecture and management of optical burst switching nodes 

    Gil López, Gustavo (Universitat Politècnica de Catalunya, 2002-06)
    Projecte/Treball Final de Carrera
    Accés obert
    Realitzat a/amb:  Technische Universiteit Eindhoven
  • Coherent control of light propagation in integrated optical waveguides 

    Menchón Enrich, Ricard (Universitat Politècnica de Catalunya / Universitat Autònoma de Barcelona, 2009-09-09)
    Projecte Final de Màster Oficial
    Accés obert
    Coherent control and manipulation of light propagation in systems of three coupled rib optical waveguides is addressed. We show that by an appropriate variation of the distance among waveguides, it is possible to transfer ...
  • Coupling of photonic wire bonds to TriPleX waveguides 

    Cabrejo Ponce, Meritxell (Universitat Politècnica de Catalunya, 2017-05-31)
    Treball Final de Grau
    Accés restringit per acord de confidencialitat
    Realitzat a/amb:  Karlsruher Institut für Technologie
  • Dispositivos optoelectrónicos con grafeno para comunicaciones ópticas: guías ópticas de silicio y grafeno 

    Monpeat López, Salvador (Universitat Politècnica de Catalunya, 2017-05)
    Treball Final de Grau
    60 months embargo
  • Dynamic behaviour in a nonlinear directional coupler with feedback 

    Artigas García, David; Dios Otín, Víctor Federico; Canal Bienzobas, Fernando (TAYLOR & FRANCIS LTD, 1997-06-30)
    Article
    Accés obert
    A new kind of resonator based on a nonlinear directional coupler with feedback is presented. The steady states are found and the map of the system is iterated, showing the existence of bistability, period doubling and ...
  • Enhancement and inhibition of light tunneling mediated by resonant mode conversion 

    Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2014-02-15)
    Article
    Accés restringit per política de l'editorial
    We show that the rate at which light tunnels between neighboring multimode waveguides can be drastically increased or reduced by the presence of small longitudinal periodic modulations of the waveguide properties that ...
  • Guided-to-leaky mode transition in uniaxial optical slab waveguides 

    Torner Sabata, Lluís; Recolons Martos, Jaume; Pérez Torres, Juan (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1993-10-01)
    Article
    Accés obert
    The guided-to-leaky hybrid mode transition in slab optical waveguides made on uniaxial crystals such as LiNbO3, or LiTaO 3, is analyzed. Two different guided-to-leaky transitions have been identified, namely the ordinary ...
  • Intensity-based adaptive optics with sequential optimization for laser communications 

    Carrizo, Carlos E.; Mata Calvo, Ramón; Belmonte Molina, Aniceto (2018-06-25)
    Article
    Accés obert
    Wavefront distortions of optical waves propagating through the turbulent atmosphere are responsible for phase and amplitude fluctuations, causing random fading in the signal coupled into single-mode optical fibers. Wavefront ...
  • Investigación sobre spatial-division multiplexing (SDM) en comunicaciones por fibra óptica 

    Latorre Campos, Borja (Universitat Politècnica de Catalunya, 2016-05-31)
    Projecte/Treball Final de Carrera
    Accés obert
    In this work we analyze propagating LP modes (Linearly Polarized) in different independent spatial paths, mentioning the energetic density of the electromagnetic fields of these modes with a fixed normalized frequency and ...
  • Investigation of the light propagation in the human forearm 

    Vázquez Martín, Irene (Universitat Politècnica de Catalunya, 2017-09-08)
    Projecte Final de Màster Oficial
    Accés obert
    Realitzat a/amb:  Universität Ulm
    In the present study it is investigated the applicability of spectrally resolved reflectance at a certain distance from the incident beam to determine the optical coefficients of multi-layered tissues. The main motivation ...
  • Leaky modes in multilayer anisotropic optical waveguides 

    Torner Sabata, Lluís; Canal Bienzobas, Fernando; Hernández Marco, Jordi (1990)
    Article
    Accés restringit per política de l'editorial
    The propagation characteristics of the leaky modes in planar anisotropic waveguides with a multilayer structure have been investigated by means of a compact rigorous formalism. The leakage losses and leaky transition angle ...
  • Leaky modes in multilayer uniaxial optical waveguides 

    Torner Sabata, Lluís; Hernández Marco, Jordi; Canal Bienzobas, Fernando (OPTICAL SOC AMER, 1990-04-01)
    Article
    Accés obert
    The propagation characteristics of the leaky modes in planar anisotropic waveguides with a multilayer structure have been investigated by means of a compact rigorous formalism. The leakage losses and leaky transition angle ...
  • 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 Gomà, Josep Joan (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 ...
  • Nonlinear resonant conversion of modes in optical waveguides 

    Dios Otín, Víctor Federico; Shvartsburg, Alexander B.; Artigas García, David; Canal Bienzobas, Fernando (ELSEVIER SCIENCE BV, 1995-07-31)
    Article
    Accés obert
    A new class of resonant exchange of power among three co-propagating modes in dielectric optical waveguides exhibiting Kerr-like nonlinearity is reported. Unlike the coupling of modes travelling in different, spatially ...
  • Optimisation of parametric processes in nonlinear optical waveguides 

    Bohigas Nadal, Jaume (Universitat Politècnica de Catalunya / Politecnico di Torino. Dipartimento di elettronica / Technical University of Denmark. Fotonik Department, 2013-09-10)
    Projecte/Treball Final de Carrera
    Accés obert
    Realitzat a/amb:  Politecnico di Torino
    [ANGLÈS] This Master’s Thesis presents an optimisation of parametric processes on two different materials used for optical communications. The main objective is to determine whether they are suitable for all-optical signal ...
  • Phase space description of nonlinear directional couplers 

    Artigas García, David; Dios Otín, Víctor Federico (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1994-07-01)
    Article
    Accés obert
    A comprehensive analysis of the symmetric nonlinear directional coupler as a function of the excitation conditions is reported. The analysis is based on a coupled-mode technique in normalized (dimensionless) parameters, ...
  • Potentials of guided waves in Aircraft CFRP components in terms of damage tolerance and SHM Implementation 

    Trillo Daura, Sílvia (Universitat Politècnica de Catalunya / Universität Saarlandes, 2013)
    Projecte/Treball Final de Carrera
    Accés obert
    Realitzat a/amb:  Universität des Saarlandes
    Carbon fibre reinforced polymer (CFRP) materials are a class of materials becoming possibly the most important in aeronautical structures today. Due to its relative novelty neither its damage mechanisms nor its potentials ...
  • Reglas de escala para bifurcaciones en guías ópticas 

    Recolons Martos, Jaume; Torner Sabata, Lluís; Canal Bienzobas, Fernando (1990)
    Text en actes de congrés
    Accés obert
  • Reglas de similitud para modos TE en guias opticas no lineales 

    Torres, Josep Lluis; Torner Sabata, Lluís (1991)
    Text en actes de congrés
    Accés obert
    We have shown that the stationary propcrties of TE guided waves in a slab optical waveguidewith a nonlinear Kerr-likc bounding medium can be described in a compact way bymeans of the usual normalized effective modal index ...
  • Supermode analysis of the three-waveguide nonlinear directional coupler: the critical power 

    Artigas García, David; Olivas Alguacil, Jesús; Dios Otín, Víctor Federico; Canal Bienzobas, Fernando (ELSEVIER SCIENCE BV, 1996-10-01)
    Article
    Accés obert
    The three-waveguide nonlinear directional coupler switching characteristic is studied using the eigenmodes of the structure (i.e. supermodes). This model, which is more exact than the one used in previous works, has allowed ...