Design and testing of a graded-index liquid crystal optical deflector
Optical deflectors have been used in a wide range of applications, from marking applications to optical links.Some of them are based on micro-electromechanical systems, now a growing market. Another group of deflectors is founded on acousto-optic principle, in which there is a change of a material&#...
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| Tipo de recurso: | tesis de maestría |
| Fecha de publicación: | 2009 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2099.1/21365 |
| Acceso en línea: | https://hdl.handle.net/2099.1/21365 |
| Access Level: | acceso abierto |
| Palabra clave: | Liquid crystals Cristalls líquids Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica |
| Sumario: | Optical deflectors have been used in a wide range of applications, from marking applications to optical links.Some of them are based on micro-electromechanical systems, now a growing market. Another group of deflectors is founded on acousto-optic principle, in which there is a change of a material's permittivity due to a mechanical wave. Other deviators are based on an optical phased-array or rely on magneto-optic or electro-optic properties of some materials. Usually, deviators without mechanics have a narrow angular range. We present a new electro-optical deflector device based on electro-optical properties of liquid crystal in which a graded-index is induced by the voltage applied in three electrodes. This system permits to scan a wide angular range without mechanical elements. First we will study the basics of the deflector; later on we will focus on the simulation of the deviator and the properties of the device. Finally, we will show the experimental results through the first deflector prototype. |
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