Exploració per tema "Optical wave guides"
Ara es mostren els items 1-20 de 31
-
Angular control of anisotropy-induced bound states in the continuum
(2019-11-01)
Article
Accés obertRadiation of leaky modes existing in anisotropic waveguides can be cancelled by destructive interference at special propagation directions relative to the optical axis orientation, resulting in fully bound states surrounded ... -
Architecture and management of optical burst switching nodes
(Universitat Politècnica de Catalunya, 2002-06)
Projecte/Treball Final de Carrera
Accés obert
Realitzat a/amb: Technische Universiteit Eindhoven -
CMOS photonic devices characterization and quantum computing architecture design
(Universitat Politècnica de Catalunya, 2018-02-07)
Treball Final de Grau
Accés obert
Realitzat a/amb: Massachusetts Institute of TechnologyQuantum computing is an exciting new technology that will allow to solve some problems that current computers cannot do. However, most of the technologies being researched for quantum computing need ultra-low temperatures ... -
Coherent control of light propagation in integrated optical waveguides
(Universitat Politècnica de Catalunya / Universitat Autònoma de Barcelona, 2009-09-09)
Projecte Final de Màster Oficial
Accés obertCoherent 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
(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
(Universitat Politècnica de Catalunya, 2017-05)
Treball Final de Grau
Accés obert -
Dynamic behaviour in a nonlinear directional coupler with feedback
(TAYLOR & FRANCIS LTD, 1997-06-30)
Article
Accés obertA 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
(2014-02-15)
Article
Accés restringit per política de l'editorialWe 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 ... -
Fast correction in adaptive optical system using block control
(Universidad de Murcia, 2011)
Text en actes de congrés
Accés obertWe propose to take advantage of the sparse structure of the control matrix in adaptive optical systems in order to allow the acceleration of the control loop in real time wavefront correction. The idea is using the local ... -
Guided-to-leaky mode transition in uniaxial optical slab waveguides
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1993-10-01)
Article
Accés obertThe 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
(2018-06-25)
Article
Accés obertWavefront 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
(Universitat Politècnica de Catalunya, 2016-05-31)
Projecte/Treball Final de Carrera
Accés obertIn 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
(Universitat Politècnica de Catalunya, 2017-09-08)
Projecte Final de Màster Oficial
Accés obert
Realitzat a/amb: Universität UlmIn 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
(1990)
Article
Accés restringit per política de l'editorialThe 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
(OPTICAL SOC AMER, 1990-04-01)
Article
Accés obertThe 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
(2016)
Presentació
Accés restringit per política de l'editorialDirect 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
(ELSEVIER SCIENCE BV, 1995-07-31)
Article
Accés obertA 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
(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
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1994-07-01)
Article
Accés obertA 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
(Universitat Politècnica de Catalunya / Universität Saarlandes, 2013)
Projecte/Treball Final de Carrera
Accés obert
Realitzat a/amb: Universität des SaarlandesCarbon 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 ...