{"id":68329,"date":"2018-03-09T22:56:48","date_gmt":"2018-03-09T22:56:48","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sistemas-de-banda-ancha-sobre-fibras-opticas-multimodo-empleando-fuentes-estrechas-y-excitacion-modal-central\/"},"modified":"2018-03-09T22:56:48","modified_gmt":"2018-03-09T22:56:48","slug":"sistemas-de-banda-ancha-sobre-fibras-opticas-multimodo-empleando-fuentes-estrechas-y-excitacion-modal-central","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/propagacion-de-ondas-electromagneticas\/sistemas-de-banda-ancha-sobre-fibras-opticas-multimodo-empleando-fuentes-estrechas-y-excitacion-modal-central\/","title":{"rendered":"Sistemas de banda ancha sobre fibras \u00f3pticas multimodo empleando fuentes estrechas y excitaci\u00f3n modal central."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Ivana Gasulla Mestre <\/strong><\/h2>\n<p>El r\u00e1pido crecimiento en la demanda de capacidad de transmisi\u00f3n en las redes incorporadas y de acceso al usuario ha promovido la tendencia actual a valerse de la infraestructura existente de fibra \u00f3ptica multimodo (mmf) para transmitir a 10 gb\/s, tal y como establece el est\u00e1ndar 10-gigabit ethernet.  el principal objetivo de esta tesis doctoral consiste en la propuesta, an\u00e1lisis y validaci\u00f3n experimental de t\u00e9cnicas que permitan capacidades de transmisi\u00f3n superiores a los 10 gb\/s a trav\u00e9s de enlaces de mmf de corto y medio alcance. La mmf presenta un ancho de banda mucho menor que la fibra monomodo (smf) como consecuencia de la dispersi\u00f3n en los retardos de propagaci\u00f3n de los diversos modos guiados. En este contexto resulta indispensable disponer de modelos que ofrezcan una descripci\u00f3n precisa de la propagaci\u00f3n a trav\u00e9s de mmf y permitan estudiar diversas soluciones orientadas a limitar la dispersi\u00f3n intermodal. En esta tesis se ha desarrollado el primer modelo anal\u00edtico basado en la propagaci\u00f3n de campo el\u00e9ctrico que permite evaluar la respuesta en banda base y radiofrecuencia de un enlace de mmf, considerando dispersi\u00f3n crom\u00e1tica de segundo y de tercer orden. Se han evaluado distintas fuentes de degradaci\u00f3n como son la distorsi\u00f3n arm\u00f3nica y de intermodulaci\u00f3n y el impacto del ruido modal. La b\u00fasqueda de soluciones capaces de aumentar la capacidad de transmisi\u00f3n nos ha llevado a establecer te\u00f3rica y experimentalmente dos condiciones necesarias para la transmisi\u00f3n potencial de se\u00f1ales de banda ancha m\u00e1s all\u00e1 del producto ancho de banda por distancia de la mmf: la implementaci\u00f3n de esquemas de excitaci\u00f3n selectiva central de modos y el empleo de fuentes \u00f3pticas con una anchura de l\u00ednea estrecha. La combinaci\u00f3n de ambas soluciones con la aplicaci\u00f3n de t\u00e9cnicas scm y wdm ha resultado en la transmisi\u00f3n de se\u00f1ales de banda ancha, tanto radio sobre fibra como digitales en banda base, a trav\u00e9s de enlaces de mmf de s\u00edlice de hasta 5 km de longitud. Cabe destacar que se ha l<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Sistemas de banda ancha sobre fibras \u00f3pticas multimodo empleando fuentes estrechas y excitaci\u00f3n modal central.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Sistemas de banda ancha sobre fibras \u00f3pticas multimodo empleando fuentes estrechas y excitaci\u00f3n modal central. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Ivana Gasulla Mestre <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Valencia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 28\/11\/2008<\/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>Jos\u00e9 Capmany Francoy<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: salvador Sales maicas <\/li>\n<li>Javier Fraile pelaez (vocal)<\/li>\n<li>Miguel angel Muriel fernandez (vocal)<\/li>\n<li>joseba Zubia zaballa (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Ivana Gasulla Mestre El r\u00e1pido crecimiento en la demanda de capacidad de transmisi\u00f3n en las redes incorporadas [&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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