Abstract
Planar optical waveguides were built up by proton implantation (ion of H +) in single crystal of lithium niobate. The waveguide properties are investigated by a prism coupling technique (M-lines spectroscopy). The reconstructed refractive index variation profile obtained with the inverse WKB method, is compared with the ion concentration profile as determined by TRIM simulation program. The electro-optic coefficient, r 13, has been measured through the change in coupling angle of the modes excitation under an applied electric field.
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