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Autor Calvo Padilla, María Luisa |
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Moreno Soriano, Ignacio ; Yzuel, María J. ; Calvo Padilla, María Luisa | SPIE - International Society for Optical Engineering | 2018In this work, we review the main activities related to the International Day of Light (IDL) in Spain. We describe the actions of the Spanish Committee for IDL that has been created in Spain, reactivating the Spanish Committee for the Internation[...]texto impreso
In this article we report on the activities in Spain related to the celebration of the International Day of Light (IDL). The Spanish Committee for the IDL was constituted in 2017, as a continuation of the previous Committee for the International[...]texto impreso
Mondal, Pronab K. ; Calvo Padilla, María Luisa ; Chevalier del Río, Margarita ; Lakshminarayanan, Vasudevan | The International Society of Optical Engineering (SPIE) | 1991Resolution criteria for resolving two line images under coherent and incoherent illumination are presented. This technique has been used to interpret psychophysical data obtained from hyperacuity paradigms.texto impreso
Fernández Álvarez-Estrada, Ramón ; Calvo Padilla, María Luisa | Optical Society of America | 1987-04A three-dimensional analysis of bending losses in dielectric optical waveguides is presented. It constitutes a nontrivial generalization of previous two- and three-dimensional studies by other authors. Our analysis is based on homogeneous integr[...]texto impreso
Cámara, Alejandro ; Alieva, Tatiana Krasheninnikova ; Rodrigo Martín-Romo, José Augusto ; Calvo Padilla, María Luisa | The Electromagnetics Academy | 2010The numerical demonstration of the phase-space tomographic reconstruction method of non-separable beams is presented in this contribution. The Wigner distribution of a Laguerre-Gaussian beam is recovered from numerically simulated intensity meas[...]texto impreso
We introduce a coupling model to describe the geometry conversion in various wave fronts diffracted by a holocoupler recorded with two different Gaussian beams. We conjecture the possibilities for using the proposed device as a beam corrector.texto impreso
Villafranca Velasco, Aitor ; Calvo Padilla, María Luisa ; Cheben, Pavel ; Ortega Moñux, Alejandro ; Schmid, Jens H. ; Alonso Ramos, Carlos ; Molina Fernández, Íñigo ; Lapointe, Jean ; Vachon, Martin ; Janz, Siegfried ; Xu, Dan-Xia | IEEE | 2012We demonstrate an ultracompact polarization mode converter based on a silicon-on-insulator waveguide with two longitudinal subwavelength trenches. An extinction ratio of 16 dB at 1.5 ?m is achieved for a device length of 10 ?m.texto impreso
Villafranca Velasco, Aitor ; Calvo Padilla, María Luisa ; Cheben, Pavel ; Ortega Moñux, Alejandro ; Alonso Ramos, Carlos Alberto ; Molina Fernández, Íñigo ; Lapointe, Jean ; Vachon, Martin ; Janz, Siegfried ; Xu, Dan-Xia | The Optical Society Of America | 2012-02-01The design and fabrication of an ultracompact silicon-on-insulator polarization converter is reported. The polarization conversion with an extinction ratio of 16 dB is achieved for a conversion length of only 10 mu m. Polarization rotation is ac[...]texto impreso
Monte Muñoz de la Peña, Francisco del ; Martínez Matos, Óscar ; Rodrigo Martín-Romo, José Augusto ; Calvo Padilla, María Luisa ; Cheben, Pavel | Wiley-V C H Verlag Gmbh | 2006-08-04Improved performance of volume holographic sol-gel materials-refractive index modulations in the 10^2 range, diffraction efficiencies near 100 %, and low levels of noise scattering-are reported that arise from the incorporation of Zr-based high [...]texto impreso
The theoretical model for an off-Bragg on-axis conversion between a Gaussian beam with cylindrical phase function and a plane wave by a volume aperiodic nonplanar inhomogeneous holographic grating is presented. A two-wave first-order coupled-wav[...]texto impreso
We present a coupled-wave-analysis-based treatment for a wave-front conversion problem between a Gaussian beam with a cylindrical phase and a plane wave for a two-dimensional on-axis geometry. A coupled-wave approach to the multiple-scattering p[...]texto impreso
Rodrigo Martín-Romo, José Augusto ; Alieva, Tatiana Krasheninnikova ; Cristóbal Pérez, Gabriel ; Calvo Padilla, María Luisa | The Optical Society Of America | 2011-09-12We present a fast and robust non-interferomentric wavefield retrieval approach suitable for imaging of both amplitude and phase distributions of scalar coherent beams. It is based on the diversity of the intensity measurements obtained under con[...]texto impreso
Martínez Matos, Óscar ; Calvo Padilla, María Luisa ; Cheben, Pavel ; Delâge, André ; Janz, Siegfried ; Xu, Dan-Xia | Society of Photo-Optical Instrumentation Engineers (SPIE) | 2004We propose a modified arrayed waveguide grating (AWG) demultiplexer formed by an array of parallel ridge waveguides of equal length fabricated in silicon-on-insulator (SOI). Each waveguide contains two sections with different widths. The lenghts[...]