Photorefractive α -Phase Proton-Exchanged LiNbO3Waveguides Prepared on Iron Doped Substrates
| Autor: | Angel García-Cabañes, A. Méndez, Mercedes Carrascosa, J. Carnicero |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Diffraction
Materials science business.industry Doping Lithium niobate Physics::Optics Photorefractive effect Condensed Matter Physics Waveguide (optics) Electronic Optical and Magnetic Materials chemistry.chemical_compound Optics chemistry Impurity Phase (matter) Optoelectronics Condensed Matter::Strongly Correlated Electrons business Nonlinear Sciences::Pattern Formation and Solitons Refractive index |
| Zdroj: | Ferroelectrics. 352:86-93 |
| ISSN: | 1563-5112 0015-0193 |
| DOI: | 10.1080/00150190701358167 |
| Popis: | In order to enhance the photorefractive effect of α -phase proton-exchanged LiNbO 3 waveguides, they have been prepared in Fe-doped LiNbO 3 substrates. The reduction state of the impurity, crucial in photorefractive performance, has been investigated. It has been found that this parameter is very sensitive to the duration of the proton exchange treatment. This result has been corroborated in undoped waveguides. Holographic gratings have been recorded in the waveguide layer, obtaining refractive index changes greater than those found in undoped waveguides and diffraction efficiencies of about 100%. The dark conductivity, measured through the dark decays of the gratings, is lower but comparable with that measured in undoped waveguides. |
| Databáze: | OpenAIRE |
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