Transformaciones de haz mediante microlentes selfoc activas

[EN]: In this paper light propagation in an active selfoc microlens with complex refractive index and gradient parameter are examined. The ray-transfer matrix of an active material regarded as a diffraction-free first order optical system is presented to describe the beam transformations in active selfoc microlenses. Results concerning Gaussian beam transformationsand on-axis irradiance through the active selfoc microlens are discussed and commented. © Sociedad Española de Óptica.[ES]: En este trabajo se estudia la propagación de la luz a través de una microlente selfoc activa con un índice de refracción y parámetro de gradiente complejos. La matriz de transferencia de rayos, vista como un sistema óptico de primer orden libre de efectos de difracción, es introducida para describir las transformaciones que puede sufrir un haz en microlentes selfoc activas. Por último se presentan y comentan los resultados correspondientes a las transformaciones de haces Gaussianos y a la irradiancia en eje a través de la microlente selfoc activa.This work has been sponsored by Xunta de Galicia/Feder (INCITE08PXIB206013PR), Ministerio de Ciencia e Innovación (MAT2010-18519) and CDTI (SURFALUX SOL-00030930), Spain. Besides, Ana I. Gomez-Varela wants to acknowledge the financial support from the FPU (Formación de Profesorado Universitario) grant 2009 (Ministerio de Educación, Spain).Peer Reviewe

Procedimiento de modificación de un material vítreo

The present invention relates to a method for modifying a vitreous material, a system suitable for carrying out said method, and the modified vitreous material that can be obtained by said method. This process improves the mechanical properties of the vitreous material. [EN]El objeto de la presente invención es un procedimiento de modificación de un material vítreo; un sistema adaptado para realizar dicho procedimiento y el material vítreo modificado obtenible mediante dicho procedimiento. Este proceso mejora las propiedades mecánicas del material vítreo. [ES]Peer reviewedConsejo Superior de Investigaciones Científicas, Universidad de ZaragozaA1 Solicitud de patente con informe sobre el estado de la técnic

Beam transformations by active GRIN materials

Beam transformations process by active materials allows, in a controlled manner, the redistribution of the irradiance and phase of light. A material that exhibits quadratic gain or loss and refractive index profiles is regarded as active GRIN (GRadient-INdex) material. Complex refractive index is examined in order to discuss what loss or gain means in terms of the refractive index. General conditions for beam transformations by active GRIN materials are obtained in a 2D space of the complex curvature. Irradiance evolution through an active selfoc microlens is presented and it is analyzed at planes where beam shaping occurs.This work has been supported by the projects INCITE08PXIB206013PR Xunta/Feder and MAT2010-18519, Ministerio de Ciencia e Innovación, Spain. Besides, Ana I. Gomez-Varela wants to acknowledge the financial support from the FPU (Formación de Profesorado Universitario) grant 2009 (Ministerio de Educación, Spain).Peer Reviewe

Large area, homogeneous laser-induced-periodic-surfacestructures (LIPSS) produced by high repetition rate, fs-laser beam scanning at high speed

San Francisco, California, USA, 13-18 February 2016.Peer Reviewe