{"id":73668,"date":"2018-03-09T23:18:34","date_gmt":"2018-03-09T23:18:34","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/analisis-y-sa%c2%adntesis-de-gratings-de-bragg-mediante-la-transformada-de-fourier\/"},"modified":"2018-03-09T23:18:34","modified_gmt":"2018-03-09T23:18:34","slug":"analisis-y-sa%c2%adntesis-de-gratings-de-bragg-mediante-la-transformada-de-fourier","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/analisis-y-sa%c2%adntesis-de-gratings-de-bragg-mediante-la-transformada-de-fourier\/","title":{"rendered":"An\u00e1lisis y s\u00edntesis de gratings de bragg mediante la transformada de fourier"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Aguado Manzano Juan  Carlos <\/strong><\/h2>\n<p>El objetivo de esta tesis es el estudio de los algoritmos de s\u00edntesis y an\u00e1lisis de gratings de bragg, y de entre todas las posibilidades existentes aqu\u00e9llos basados en la transformada de fourier. Para ello se comienzan analizando los diferentes algoritmos ya presentados en la literatura haciendo especial hincapi\u00e9 en los que se basan en la transformada de fourier.  para dar un enfoque nuevo a un problema antiguo se analizan las propiedades generales que poseen los gratings. Ello nos lleva a usar la teor\u00eda de acoplamiento de modos para describir los gratings uniformes de bragg, resultando de especial inter\u00e9s los resultados referidos a la fase del espectro de reflexi\u00f3n. tambi\u00e9n en esta l\u00ednea se describen t\u00e9cnicas digitales para representar los gratings, estableci\u00e9ndose de esta forma una relaci\u00f3n con los filtros digitales y la transformada z. Todo esto nos ayuda a definir con mayor precisi\u00f3n el papel de la funci\u00f3n de fase en el espectro y a introducir un elemento esencial que ya no nos abandonar\u00e1 en el resto del trabajo: la causalidad del grating como principio f\u00edsico fundamental para explicar el comportamiento de este tipo de dispositivos.  se retoma por lo tanto el estudio de los algoritmos de an\u00e1lisis y s\u00edntesis basados en la transformada de fourier desde el mismo punto de partida que los que ya exist\u00edan, esto es, la ecuaci\u00f3n diferencial de ricatti, pero teniendo en cuenta las conclusiones que hab\u00edamos obtenido acerca de la relaci\u00f3n entre m\u00f3dulo y fase. Esto nos llevar\u00e1 a una nueva definici\u00f3n de los algoritmos basados en este tipo de transformada, localizando las fuentes de error que antes quedaban ocultas debido a los procesos imperfectos de aproximaci\u00f3n utilizados y a explicar en general el comportamiento an\u00f3malo de los mismos debido a la naturaleza de la funci\u00f3n de fase del espectro y su relaci\u00f3n con el m\u00f3dulo del espectro v\u00eda el principio de causalidad.  finalmente, todo este bagaje as\u00ed obtenido permi<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>An\u00e1lisis y s\u00edntesis de gratings de bragg mediante la transformada de fourier<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 An\u00e1lisis y s\u00edntesis de gratings de bragg mediante la transformada de fourier <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Aguado Manzano Juan  Carlos <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Valladolid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 22\/04\/2005<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Ruben Mateo Lorenzo Toledo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  Abril domingo evaristo jos\u00e9 <\/li>\n<li> Blanco vidal Jos\u00e9 Mar\u00eda (vocal)<\/li>\n<li>Francisco Fraile pel\u00e1ez (vocal)<\/li>\n<li>Juan Lopez coronado (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Aguado Manzano Juan Carlos El objetivo de esta tesis es el estudio de los algoritmos de s\u00edntesis [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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