Del anteojo a la óptica adaptativa

Buena parte de lo que conocemos del universo se debe a lo que se aprecia a través de los telescopios, pero estos no siempre han tenido la misma forma, ni la misma precisión. Desde que por primera vez Galileo utilizara un anteojo en el siglo XVII éste no ha dejado de evolucionar

Preludio sobre ondas, luz, universo y tecnologías de telecomunicación

Lección Inaugural impartida por el Prof. Dr. D. Antonio Puerta Notario con motivo de la inauguración del Curso Academico 2011-201

Converging Underwater and FSO Ground Communication Links

We propose a new combined underwater-atmospheric optical communication link for providing a high speed optical connectivity between onshore and sumerge systems. New average BER expressions are derived when assuming amplify-and-forward (AF) relay.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

A Unifying Statistical Model for Atmospheric Optical Scintillation

In this paper we develop a new statistical model for the irradiance fluctuations of an unbounded optical wavefront (plane and spherical waves) propagating through a turbulent medium under all irradiance fluctuation conditions in homogeneous, isotropic turbulence. The major advantage of the model is that leads to closed-form and mathematically-tractable expressions for the fundamental channel statistics of an unbounded optical wavefront under all turbulent regimes. Furthermore, it unifies most of the proposed statistical models for the irradiance fluctuations derived in the bibliography providing, in addition, an excellent agreement with the experimental data.Comment: An extended version of this paper has been submitted and provisionally accepted for publication in the book under the working title "Numerical Simulations / Book 2", Ed. Intech, ISBN 978-953-307-1423-

Efecto del desalineamiento en enlaces para comunicaciones entre vehı́culos con luz visible

In this paper, the impact of misalignments on visible-light vehicle-to-vehicle (V2V) links is examined. By means of modeling and simulation, the signal-to-noise ratio (SNR) of the V2V channel formed by two vehicles driving in a platoon arrangement on a two-lane road with straight and curved sections is obtained and analyzed. Results show that misalignments caused by road curves can greatly reduce the SNR and, therefore, the link range. However, the SNR reduction can be mitigated using curve adaptive headlights and link range can be increased using higher FOVs

Characterization of sub-channel based Málaga atmospheric optical links with real β parameter

A generalization of the Málaga atmospheric optical communications links treated as a finite number of generalized-K distributed sub-channels is analyzed in terms of outage probability and outage rate when its β parameter belongs to the set of real numbers. To the best of the author’s knowledge, this is the first time that β ∈ ℜ is considered. The new analytical expressions derived in this paper lead to a new physical and more realistic interpretation of atmospheric optical links, especially in terms of performance

Design and characterization of a pure phase modulator based on TNLC

In this work, we present a complete process to obtain a pure phase modulator based on a twisted nematic liquid crystal display (TNLCD). We first describe a simple technique for measuring the physical parameters of each cell of this device with no ambiguities, and we use them to build a simplified model of the display based on the Jones matrix theory. Then, after selecting a proper optical system for pure phase modulation, an optimal configuration of the system is searched using a numerical algorithm. This procedure drastically reduces the voluminous experimental stage this task normally requires. The presented method is verified through experimental results, finding an excellent agreement between the measurements and the predicted data.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech