Guided-to-leaky mode transition in uniaxial optical slab waveguides
The guided-to-leaky hybrid mode transition in slab optical waveguides made on uniaxial crystals such as LiNbO3, or LiTaO 3, is analyzed. Two different guided-to-leaky transitions have been identified, namely the ordinary cutoff and the extraordinary cutoff, which occur when considering negative and...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1993 |
| 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:2117/2058 |
| Acceso en línea: | https://hdl.handle.net/2117/2058 |
| Access Level: | acceso abierto |
| Palabra clave: | Optical wave guides Integrated optics Wave guides Tuning integrated optics optical losses optical waveguide theory tuning LiNbO3 LiTaO3 birefringent materials critical optical axis orientation critical orientation extraordinary cutoff guided-to-leaky mode transition guided-to-leaky transitions leaky modes ordinary cutoff slab optical waveguides totally guided hybrid modes transcendental expressions uniaxial crystals uniaxial optical slab waveguides waveguide axis waveguide parameters Guies d'ones òptiques Òptica integrada Guies d'ones Afinació Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció |
| Sumario: | The guided-to-leaky hybrid mode transition in slab optical waveguides made on uniaxial crystals such as LiNbO3, or LiTaO 3, is analyzed. Two different guided-to-leaky transitions have been identified, namely the ordinary cutoff and the extraordinary cutoff, which occur when considering negative and positive birefringent materials, respectively. Analytical but transcendental expressions have been obtained, yielding the critical optical axis orientation, relative to the waveguide axis, above which the totally guided hybrid modes become leaky. The results indicate that the value of the critical orientation strongly depends on the waveguide parameters. The possibility of tuning this critical orientation to a desired value through the waveguide parameters is discussed. |
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