Abstract

A localized increase in the refractive index of ferroelectric crystals has been accomplished by the use of static strain induced from a surface film. The technique does not require alteration of substrate composition by diffusion or ion exchange^1-3. Optical waveguides have been produced by this method in LiNb0₃, LiTa0₃ and BaTi0₃. This represents the first formation of waveguides in BaTi0_3> which is ideally suited for making compact low-voltage polarization control guided-wave devices and optical filters due to its large г electrooptic coefficient.

© 1992 Optical Society of America