{"id":116765,"date":"2014-05-12T00:00:00","date_gmt":"2014-05-12T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/ultrafast-optical-parametric-oscillators-novel-systems-techniques-and-concepts\/"},"modified":"2014-05-12T00:00:00","modified_gmt":"2014-05-12T00:00:00","slug":"ultrafast-optical-parametric-oscillators-novel-systems-techniques-and-concepts","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/optica\/ultrafast-optical-parametric-oscillators-novel-systems-techniques-and-concepts\/","title":{"rendered":"Ultrafast optical parametric oscillators-novel systems, techniques, and concepts"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Venkata Ramaiah Badarla <\/strong><\/h2>\n<p>En esta tesis, hemos demostrado varios osciladores \u00f3pticos param\u00e9tricos ultrarr\u00e1pidos (opo) basados en diferentes medios no lineales. La tesis consta de sistemas opo, t\u00e9cnicas novedosas, dise\u00f1os y conceptos que han facilitado el acceso a longitudes de onda de 1 \u00c2\u00b5m en la regi\u00f3n del infrarrojo cercano, as\u00ed como hasta 8 \u00c2\u00b5m en la regi\u00f3n del infrarrojo medio.  hemos desarrollado un femtosegundo (fs) opo basado en bib3o6 (bibo) directamente bombeado por un l\u00e1ser kerr-lens mode-locked (klm) de ti:zafiro. Este sistema proporciona amplia y r\u00e1pida sintonizaci\u00f3n en el rango 1400-1560 nm con s\u00f3lo cambiar la longitud de la cavidad. Tambi\u00e9n, gracias a las propiedades \u00f3pticas \u00fanicas de bibo en la interacci\u00f3n tipo i (e\u00c2\u00bfoo), hemos demostrado el primer fs opo self-phaselocked degenerado. Adem\u00e1s, hemos desarrollado una t\u00e9cnica llamada retro reflexi\u00f3n sincronizada para la reducci\u00f3n del umbral y amplificaci\u00f3n de se\u00f1al, antes de la aparici\u00f3n de la oscilaci\u00f3n.Esta t\u00e9cnica es gen\u00e9rica y es particularmente \u00fatil para implementar opos ultrarr\u00e1pidos con materiales birrefringentes que tienen relativamente baja ganancia no lineal y cuando existe una limitaci\u00f3n de la potencia de bombeo. Adicionalmente, hemos desarrollado un fs opo con longitud de onda dual que presenta sintonizaci\u00f3n arbitraria e independiente mediante el uso de un interfer\u00f3metro de anillo antirresonante (arr) o sagnac. Esta t\u00e9cnica universal de acoplamiento de dos osciladores \u00f3pticos puede ser empleada en cualquier r\u00e9gimen temporal (desde cw a ultrarr\u00e1pido de pico o femtosegundo) e independientemente de las longitudes de  onda de operaci\u00f3n. Esta t\u00e9cnica puede ser utilizada para la generaci\u00f3n de thz intracavidad, permitiendo aprovechar la alta intensidad de los pulsos oscilantes. Adem\u00e1s, hemos desarrollado un sistema opo de doble cristal y doble bombeo para la amplificaci\u00f3n de la se\u00f1al dentro de la cavidad tanto en r\u00e9gimen de fs como de ps, para el ajuste de longitud de onda arbitraria e independiente. En ambos sistemas los dos cristales comparten la misma cavidad \u00f3ptica, pero son bombeados independientemente por una sola fuente l\u00e1ser.  por \u00faltimo, hemos dise\u00f1ado y demostrado experimentalmente un concepto novedoso para bombear un opo dentro de otro opo mediante un dise\u00f1o de cavidad compuesta en cascada. Este sistema de estado s\u00f3lido opo de femtosegundo bombeado por el l\u00e1ser de ti: zafiro es potencialmente capaz de proporcionar acceso a la regi\u00f3n del infrarrojo medio m\u00e1s all\u00e1 de 4 \u00c2\u00b5m incluso hasta las 18 \u00c2\u00b5m, realizando una cuidadosa selecci\u00f3n del medio no lineal.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Ultrafast optical parametric oscillators-novel systems, techniques, and concepts<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Ultrafast optical parametric oscillators-novel systems, techniques, and concepts <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Venkata Ramaiah Badarla <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 05\/12\/2014<\/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>Majid Ebrahim Zadeh<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: antoniangelo Agnesi <\/li>\n<li>irina Sorokina (vocal)<\/li>\n<li>  (vocal)<\/li>\n<li>  (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Venkata Ramaiah Badarla En esta tesis, hemos demostrado varios osciladores \u00f3pticos param\u00e9tricos ultrarr\u00e1pidos (opo) basados en diferentes [&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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