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Autor Mejías Arias, Pedro Miguel |
Documentos disponibles escritos por este autor (33)
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Piquero Sanz, Gemma María ; Movilla Serrano, Jesús María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | Kluwer Academic Publishers | 2000-12On the basis of well-known methods to obtain the standard Stokes parameters, two simple experimental procedures are analysed to measure the so-called generalized degree of polarization, P, defined elsewhere [Opt. Commun., 149 (1998) 230]. After [...]texto impreso
Serna Galán, Julio ; Martínez, C. ; Encinas Sanz, Fernando ; Martínez Herrero, Rosario ; Mejías Arias, Pedro Miguel | Elsevier Science B.V. | 1997-07-01From the application of a simple analytical model to describe a laser pulse, the transversal spatial structure of the pulse amplitude is linked to its (measurable) second-order intensity moments, integrated along the pulse duration. These formul[...]texto impreso
Piquero Sanz, Gemma María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | Elsevier Science BV | 1995-03-15The behaviour of the kurtosis parameter of a partially coherent beam that freely propagates is investigated. A general classification scheme of light beams is given in terms of the number of extremals of the kurtosis in free space. Propagation t[...]texto impreso
Piquero Sanz, Gemma María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | Elsevier Science BV | 2006-09-01Several overall parameters are introduced to characterize the linear or circular polarization content of a non-uniformly totally polarized beam over the region of its wavefront where the irradiance is significant. These figures of merit are dete[...]texto impreso
Serna Galán, Julio ; Martínez Herrero, Rosario ; Mejías Arias, Pedro Miguel | The Optical Society Of America | 1991-07Within the formalism of the Wigner distribution function, a new parameter is proposed, which characterizes arbitrary tridimensional partially coherent beams and is invariant through ABCD optical systems. The relationship between such a parameter[...]texto impreso
Serna Galán, Julio ; Piquero Sanz, Gemma María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | Chapman & Hall Ltd. | 1996-08The influence of super-Gaussian apertures on the beam power, beam size, beam quality factor and kurtosis parameter of Hermite-Gauss mode beams and Gauss Schell-model fields is investigated in detail.texto impreso
Piquero Sanz, Gemma María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | SPIE - International Society of Optical Engineering | 1996As is well-known, pure-phase transmittances are not, in general, first-order optical systems. It thus seems that a simple ABCD-propagation law cannot be applied to this kind of transmittance. In other words, such optical elements could not be ch[...]texto impreso
Piquero Sanz, Gemma María ; Movilla Serrano, Jesús María ; Martínez Herrero, Rosario ; Mejías Arias, Pedro Miguel | Elsevier Science BV | 1998-04-15A new overall parameter is defined, namely, the generalized degree of polarization, which involves the spatial distribution of the polarization of a light beam. This parameter is introduced on the basis of a general treatment recently proposed [[...]texto impreso
Piquero Sanz, Gemma María ; Martínez Herrero, Rosario ; Mejías Arias, Pedro Miguel | IOP Publishing Ltd. | 2004-03On the basis of the second-order intensity moments formalism, the relationship between the spatial structure and the overall polarization characteristics of partially polarized Gaussian Schell-model beams of a certain kind has been investigated.[...]texto impreso
Piquero Sanz, Gemma María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | Elsevier Science BV | 1996-08-15The propagation laws of the intensity moments of a laser beam through ABCD optical systems are generalized to include pure phase transmittances. This is done by representing the behaviour of such transmittances by means of a 4 x 4 matrix, hi, wh[...]texto impreso
Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario ; Bernabeu Martínez, Eusebio | American Physical Society | 1986-03A novel type of optical bistable configuration, namely the so-called double-ring (DR) device, is presented. The stationary solutions in the purely absorptive case for a homogeneously broadened atomic system are derived. In the mean-field limit i[...]texto impreso
Serna Galán, Julio ; Martínez Herrero, Rosario ; Mejías Arias, Pedro Miguel | SPIE--The International Society for Optical Engineering | 1993Beam quality behavior of Hermite-Gauss modes and Gauss Schell-model fields propagating through super-Gaussian apertures are analyzed.texto impreso
Piquero Sanz, Gemma María ; Mejías Arias, Pedro Miguel ; Martínez Herrero, Rosario | Elsevier Science BV | 1994-02-15The beam quality parameter of gaussian fields propagating through axicons is investigated. A simple analytical formula is derived for the output quality parameter in terms of the input beam width, refractive index of the axicon material and the [...]texto impreso
Piquero Sanz, Gemma María ; Martínez Herrero, Rosario ; Mejías Arias, Pedro Miguel | SPIE--The International Society for Optical Engineering | 2003Use of anisotropic pure phase plates to improve the quality parameter of certain partially coherent and partially polarized beams is investigated. Analytical expressions for the beam quality after propagation through these anisotropic transmitta[...]texto impreso
Piquero Sanz, Gemma María ; Martínez Herrero, Rosario ; Mejías Arias, Pedro Miguel | The Optical Society of America (OSA) | 1992-12-01The effects that quartic phase distortions produce in the beam-quality parameter of partially coherent symmetric-intensity beams are studied. An analytical expression for the beam-quality parameter at the output plane of a pure phase plate with [...]