A semi-analytic technique to determine the propagation constant of periodically segmented Ti:LiNbO3 waveguide
نویسنده
چکیده
A semi-analytical technique to determine the propagation constant of periodically segmented Ti:LiNbO3 waveguide (PSW) is described. The 2-D refractive index profiles of the waveguide segments are computed from its fabrication parameters, such as, Ti-layer thickness and width, and the diffusion parameters. WKB method is used to transform 2-D refractive index profile to 1D lateral effective index profile, which is then converted to equivalent refractive index profile of the PSW. Finally transfer matrix method is applied to compute the propagation constant of the waveguide.
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