Waveguide optical planar lenses in LiNbO3 — Theory and experiments |
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| Authors: | Zang De Yu |
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| Affiliation: | Shanghai Institute of Semiconductor Devices, P.O. Box 5048, Shanghai, China |
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| Abstract: | A simple, efficient method for the fabrication of a waveguide optical planar lens is reported. The method is based upon the Ti-indiffusion (TI), proton-exchange (PE), and Ti-indiffusion—proton-exchange (TIPE) techniques in LiNbO3 substrates. The effective refractive indices of the TI waveguide are very different. Starting with Fermat's principle a non-spherical contour lens can be designed. The experimental result of an F = 15 mm dual lens is described, the focal characteristic of which is excellent. |
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