Parametrización espacial de haces luminosos y su conformado mediante diversos sistemas ópticos No-ABCD

El objetivo del trabajo de investigación presentado ha sido proponer y estudiar un conformado de tipo global de haces luminosos, mediante la modificación de determinados parámetros espaciales característicos también globales. En especial, se han manejado y medido los denominados parámetro de calidad de haz y parámetro de curtosis. Asimismo se han considerado ciertos sistemas ópticos no-abcd tales como axicones, lentes toroidales, transmitancias de fase cuartica bi y tridimensionales y lentes con aberración esféricaDepto. de ÓpticaFac. de Ciencias FísicasTRUEpu

Linear Gaussian intensity distributions synthesized by reflection on elliptic cylinders: a proposal

A Procedure for obtaining linear (one-dimensional) Gaussian intensity distributions over certain plane regions is proposed. The method is based on the reflection of plane beams on elliptic cylinders

Mueller Matrix Polarimetry by Means of Azimuthally Polarized Beams and Adapted Commercial Polarimeter

A simple method for Mueller matrix polarimetry is proposed. The experimental set up is based on using an azimuthally polarized input beam, which presents all possible linearly polarized states across its transverse section, and an adapted commercial light polarimeter for analyzing the polarization state of the output beam. It will be shown that by measuring the Stokes parameters at only three different positions across the output beam section, the complete Mueller matrix of linear deterministic samples can be easily determined

Polarization changes at Lyot depolarizer output for different types of input beams

Lyot depolarizers are optical devices made of birefringent materials used for producing unpolarized beams from totally polarized incident light. The depolarization is produced for polychromatic input beams due to the different phase introduced by the Lyot depolarizer for each wavelength. The effect of this device on other types of incident fields is investigated. In particular two cases are analyzed: (i) monochromatic and nonuniformly polarized incident beams and (ii) incident light synthesized by superposition of two monochromatic orthogonally polarized beams with different wavelengths. In the last case, it is theoretically and experimentally shown that the Lyot depolarizer increases the degree of polarization instead of depolarizes

Polarimetry with azimuthally polarized light

Nonuniformly polarized light can be used for Mueller polarimetry of homogeneous linear samples. In this work, a set up based on using azimuthally polarized input light and a modified commercial light polarimeter is proposed and developed. With this set up, a Mueller submatrix of a sample can be obtained by measuring the Stokes parameters at only three different positions across the output beam section. Symmetry constraints for linear deterministic samples allow the complete Mueller matrix to be deduced for this kind of specimens. The experimental results obtained for phase plates and for a linear polarizer confirm the validity of the proposed method

Non-uniformly polarized beams across their transverse profiles: an introductory study for undergraduate optics courses

We provide a simple theoretical study of beams non-uniformly polarized across their transverse sections which can be introduced in undergraduate optics courses. In order to generate such beams we propose to use a slightly convergent (or divergent) linearly and uniformly polarized beam impinging on an anisotropic uniaxial material with the beam propagation direction along the optic axis. Analytical expressions for the Jones vector, Stokes parameters, ellipticity and azimuth at each point of the transverse section, perpendicular to the propagation direction, are obtained at the output of this system. By means of these parameters a detailed description of the state of polarization across the transverse profile is given

Partially Coherent Linearly Polarized Sources with Inhomogeneous Azimuth

A new model of physically realizable electromagnetic source is proposed. The source is partially coherent and non-uniformly totally polarized. The coherence and polarization characteristics of this new source are analyzed. The spatial coherence area of the source can be easily modified at will. The state of polarization is linear across the transverse plane of the source with an azimuth that varies from point to point in a different way depending on the selected values of the parameters that define the source

Vortex pseudo Schell-model source: a proposal

In this work a physically realizable pseudo Schell-model planar light source with optical vortex is proposed. The characteristics of irradiance and coherence of the beam radiated by this type of source are analysed at the source plane and upon free paraxial propagation

Analysis of the errors in polarimetry with full Poincare beams

The main error sources of a recently proposed Mueller matrix polarimetric method based on the use of full Poincare beams (FPBs) are described and analysed in detail. Numerical simulations are performed under the presence of different sources of errors. Their influence in the determination of the Mueller matrix is studied for samples presenting either birefringence or diattenuation. The present study will allow to improve the experimental procedure for obtaining the Mueller matrix of a sample using a FPB