REFRACTIVE INDEX AND THICKNESS EVALUATION OF MONOMODE AND MULTIMODE STEP-INDEX PLANAR OPTICAL WAVEGUIDES USING LONGITUDINAL SECTION MAGNETIC (LSM) AND LONGITUDINAL SECTION ELECTRIC (LSE) FORMULATION
| Autor: | María Teresa Fernández Abedul, Maria Rodriguez Lastra, Miguel García Granda, Silvino Jose Antuna Presa, Isabel Alvarez Martos, José R. García, Adrian Fernandez Gavela, Agustín Costa García |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Multi-mode optical fiber business.industry Physics::Optics Substrate (electronics) Condensed Matter Physics Electronic Optical and Magnetic Materials Wavelength Wave model Optics Planar Electrical and Electronic Engineering Step-index profile business Layer (electronics) Refractive index |
| Zdroj: | Progress In Electromagnetics Research B. 46:213-231 |
| ISSN: | 1937-6472 |
| DOI: | 10.2528/pierb12102605 |
| Popis: | In this work, we demonstrate that the LSM and LSE modes formulation is an excellent theoretical tool for determining the refractive index and thickness of the guiding layer in planar optical waveguides with step refractive index proflle. Refractive index of transparent materials capable of being deposited as a solid thin layer on a substrate for conflning light can be evaluated very accurately. The method can be applied to analyze and design monomode and multimode optical waveguides, unlike the methods proposed so far, including cutofi wavelength region. This wave model only requires the experimental evaluation of the efiective indices of the guided modes. In order to verify the developed formulation, the commercial software Olympios was used for theoretical comparison. Polymeric planar optical waveguides were fabricated and characterized. A prism coupling method and the Metricon system were used for efiective indices measurements and to compare the accuracy. The experimental evaluation of the thickness was carried out by profllometry. In all cases a complete agreement was obtained for refractive index and thickness between theory and experiments. |
| Databáze: | OpenAIRE |
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