Now showing items 21-40 of 41

    • EXAMEN FINAL 

      Dios Otín, Víctor Federico; Rius Casals, Juan Manuel (Universitat Politècnica de Catalunya, 2022-01)
      Exam
      Restricted access to the UPC academic community
    • EXAMEN FINAL 

      Artigas García, David; Comerón Tejero, Adolfo; Dios Otín, Víctor Federico; Sicard, Michaël (Universitat Politècnica de Catalunya, 2022-06-06)
      Exam
      Restricted access to the UPC academic community
    • EXAMEN PARCIAL 

      Dios Otín, Víctor Federico; Rius Casals, Juan Manuel (Universitat Politècnica de Catalunya, 2021)
      Exam
      Restricted access to the UPC academic community
    • Exponentiated weibull distribution family under aperture averaging for gaussian beam waves 

      Barrios Porras, Ricardo Alfonso; Dios Otín, Víctor Federico (2012-06-04)
      Article
      Open Access
      Nowadays, the search for a distribution capable of modeling the probability density function (PDF) of irradiance data under all conditions of atmospheric turbulence in the presence of aperture averaging still continues. Here, ...
    • Exponentiated Weibull model for the irradiance probability density function of a laser beam propagating through atmospheric turbulence 

      Barrios Porras, Ricardo Alfonso; Dios Otín, Víctor Federico (2013-02)
      Article
      Restricted access - publisher's policy
      Many distributions have been proposed to model the probability density function of irradiance fluctuations. The most widespread models nowadays are the Lognormal (LN) and Gamma–Gamma (GG) distributions. Albeit these models ...
    • FMCW lidar for multiple target sounding 

      Batet Torrell, Óscar; Dios Otín, Víctor Federico; Comerón Tejero, Adolfo (SPIE Press. The International Society for Optical Engineering, 2011)
      Conference report
      Restricted access - publisher's policy
      Continuous-Wave lidars are constantly evolving in order to achieve the best performances with low power and low cost. Frequency-modulated continuous-wave (FMCW) lidar is a well-known type of lidar used for solid-target ...
    • Intensity-modulated linear-frequency-modulated continuous-wave lidar for distributed media: fundamentals of technique 

      Batet Torrell, Óscar; Dios Otín, Víctor Federico; Comerón Tejero, Adolfo; Agishev, Ravil R. (2010-06-10)
      Article
      Restricted access - publisher's policy
      We analyze the intensity-modulation frequency-modulated continuous-wave (FMCW) technique for lidar remote sensing in the context of its application to distributed media. The goal of the technique is the reproduction of ...
    • Measurement report: Spectral and statistical analysis of aerosol hygroscopic growth from multi-wavelength lidar measurements in Barcelona, Spain 

      Sicard, Michaël; Oliveira, Daniel Camilo Fortunato dos Santos; Muñoz Porcar, Constantino; Gil Díaz, Cristina; Comerón Tejero, Adolfo; Rodríguez Gómez, Alejandro Antonio; Dios Otín, Víctor Federico (European Geosciences Union (EGU), 2022-06-14)
      Article
      Open Access
      This paper presents the estimation of the hygroscopic growth parameter of atmospheric aerosols retrieved with a multi-wavelength lidar, a micro-pulse lidar (MPL) and daily radiosoundings in the coastal region ofBarcelona, ...
    • Medida del perfil de velocidad de un líquido en un tubo de sección circular mediante un radar láser 

      García Vizcaíno, David; Recolons Martos, Jaume; Dios Otín, Víctor Federico; Comerón Tejero, Adolfo (2007-09)
      Conference report
      Open Access
      In this paper we present the measures of the profile or velocity gradient of a liquid (water) across a circular section pipe in laminar state, by means of a two-dimension laser radar system (2D-LDA) designed by the ...
    • 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
      Open Access
      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 ...
    • On the choice of the number of samples in laser Doppler anemometry signal processing 

      Dios Otín, Víctor Federico; Comerón Tejero, Adolfo; García Vizcaíno, David (2001-05)
      Article
      Open Access
      The minimum number of samples that must be taken from a sinusoidal signal affected by white Gaussian noise, in order to find its frequency with a predetermined maximum error, is derived. This analysis is of interest in ...
    • Phase space description of nonlinear directional couplers 

      Artigas García, David; Dios Otín, Víctor Federico (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1994-07-01)
      Article
      Open Access
      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, ...
    • Phase space description of nonlinear directional couplers 

      Artigas García, David; Dios Otín, Víctor Federico (1994-07)
      Article
      Open Access
      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, ...
    • Propagación de ondas monocromáticas en guíaondas dieléctricas planas formadas por medios no lineales tipo Keir: Aplicación al diseño de dispositivos lógicos 

      Dios Otín, Víctor Federico (Universitat Politècnica de Catalunya, 1992-03-05)
      Doctoral thesis
      Open Access
      El trabajo se enmarca dentro del estudio de ciertas propiedades ópticas con vistas a su inclusión en el diseño de dispositivos de conmutación de señales ópticas. En particular se ha prestado atención a los medios que exhiben ...
    • Scintillation and beam-wander analysis in an optical ground station–satellite uplink 

      Dios Otín, Víctor Federico; Rubio, Juan Antonio; Rodríguez Gómez, Alejandro Antonio; Comerón Tejero, Adolfo (OPTICAL SOC AMER, 2004-07-31)
      Article
      Open Access
    • Sistema lidar heterodino para medida de desplazamiento de superficies 

      García Vizcaíno, David; Rodríguez Gómez, Alejandro Antonio; Eslava, JA; Comerón Tejero, Adolfo; Dios Otín, Víctor Federico; Rocadenbosch Burillo, Francisco; Muñoz Porcar, Constantino (Masgrau, E. (ed.) Universidad de Zaragoza, 2000)
      Conference report
      Open Access
      Presentamos un prototipo de un sistema lidar (radar láser) de onda continua heterodino de baja potencia, para la medida de la velocidad de desplazamiento de superficies. Ofrece simplicidad y fácil alineación de ...
    • Supermode analysis of the three-waveguide nonlinear directional coupler: the critical power 

      Artigas García, David; Olivas, J; Dios Otín, Víctor Federico; Canal Bienzobas, Fernando (1996-10)
      Article
      Restricted access - publisher's policy
      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 ...
    • 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
      Open Access
      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 ...
    • Temporal analysis of laser beam propagation in the atmosphere using computer-generated long phase screens 

      Dios Otín, Víctor Federico; Recolons Martos, Jaume; Rodríguez Gómez, Alejandro Antonio; Batet Torrell, Óscar (2008-02-04)
      Article
      Open Access
      Temporal analysis of the irradiance at the detector plane is intended as the first step in the study of the mean fade time in a free optical communication system. In the present work this analysis has been performed for a ...
    • Temporal statistics of the beam-wander contribution to scintillation in ground-to-satellite optical links 

      Rodríguez Gómez, Alejandro Antonio; Dios Otín, Víctor Federico; Fernández Rubio, Juan Antonio; Comerón Tejero, Adolfo (2005-09-07)
      Article
      Open Access
      The beam-wander contribution to the scintillation in a ground-to-satellite free-space optical link is one of major importance. An analytical model, based on the duality between beam wander and angle-of-arrival fluctuations, ...