Journal of the Optical Society of America A · 2001 · 33 citations · 16 references
Natural SciencesMaterials EngineeringMaterials ScienceCrystal StructureOptical MaterialsOpticsDiffusion In SolidsIon ExchangeNonlinear Optical MaterialsNonlinear OpticsOptical Properties Of SolidsOptical WaveguidesCrystalline StructureDiffusion CoefficientsEffective Diffusion CoefficientNonlinear Optical PropertiesNonlinear WaveguidesOptical PropertiesWaveguide Electro-opticsWaveguide Materials
Waveguides in LiNbO3 are realized by a soft proton exchange (SPE) process with use of a melt of stearic acid highly diluted by lithium stearate. No phase transitions are formed when alpha-phase waveguides are obtained by SPE. The alpha-phase presents the same crystalline structure as that of pure LiNbO3 crystal, and it maintains the excellent nonlinear and electro-optical properties of the bulk material. The kinetics of the SPE method is studied by the use of secondary-ion mass spectrometry and prism-coupling techniques. The hydrogen effective diffusion coefficient as well as the self-diffusion coefficients of H+ and Li+ ions are determined as a function of the proton-exchange temperature for X-cut LiNbO3.
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Annealed proton-exchanged LiNbO_3 waveguides
Michael Bortz, M. M. Fejer · Optics Letters · 1991 · 163 citations