Calculation of extraordinary refractive index change in proton-exchanged LiTaO3 waveguides

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Original languageEnglish
Pages (from-to)1453-1454
Journal / PublicationElectronics Letters
Issue number16
Publication statusPublished - 5 Aug 1993


A theoretical index model for the extraordinary refractive index increase in proton-exchanged LiTaO3 is presented. The index change is caused by two factors: the change in spontaneous polarization and the change due to the photoelastic effect caused by the lattice volume expansion. Close agreement is obtained between quantitative calculation based on the proposed model and experiment data.