Pranabendu Ganguly
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 1- D 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.
