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Autor Cheben, Pavel |
Documentos disponibles escritos por este autor (35)
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Villafranca Velasco, Aitor ; Hernández Garay, María de la Paz ; Calvo Padilla, María Luisa ; Cheben, Pavel ; Monte Muñoz de la Peña, Francisco del | Society of Photo-Optical Instrumentation Engineers (SPIE) | 2011In this work we analyze the optical quality, performance, and recording mechanism of holographic diffraction gratings recorded in photopolymerizable sol-gel glasses. These classes of holographic photomaterials have various compositions, one of w[...]![]()
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Cheben, Pavel ; Calvo Padilla, María Luisa ; Belenguer Dávila, Tomás ; Núñez Peral, Armonía | Elsevier Science BV | 1998-03-01A novel method of substrate mode hologram (SMH) design and fabrication is presented. The coupling between a homogeneous plane wave and an arbitrary free propagating wave is achieved via a total internally reflected (TIR) wave. The input slanted [...]![]()
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Bock, Przemek J. ; Cheben, Pavel ; Villafranca Velasco, Aitor ; Schmid, Jens H. ; Delâge, André ; Florja?czyk, Miros?aw ; Lapointe, Jean ; Xu, Dan-Xia ; Vachon, Martin ; Janz, Siegfried ; Calvo Padilla, María Luisa | Wiley-V C H Verlag Gmbh | 2013-11A planar waveguide Fourier-transform spectrometer with densely arrayed Mach-Zehnder interferometers is demonstrated. Subwavelength gratings are used to produce an optical path difference without waveguide bends. The fabricated device comprises o[...]![]()
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Se presenta una revisión de las teorías de la difracción de ondas electromagnéticas por redes de volumen. En el enfoque de este trabajo se encuentran las teorías de los siguiente grupos: teorías de ondas acopladaseorías modales, teorías de dispe[...]![]()
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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.![]()
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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[...]![]()
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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 [...]![]()
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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[...]![]()
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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[...]![]()
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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[...]