Bragg relief gratings overlaid on optical waveguides may be used as high-extinction ratio wavelength filters with applications in integrated optics and optical communications. Bragg gratings have been written using electron beam lithography and etching on a complex waveguide structure consisting of a thin silicon overlay on ion diffused waveguides in LiNbO3.1 This configuration enhances the guided field closer to the surface resulting in strong interaction with the film region.

© 2000 Optical Society of America

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