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Proceedings Paper

In-Plane Scattering In LiNbO3 Waveguides
Author(s): David W. Vahey
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Paper Abstract

Experimental observations of the in-plane scattered energy distribution in Ti-diffused LiNb03 waveguides have been performed with a view toward determining and subsequently eliminating sources of scattering in this material. Results suggest that scattering from refractive-index variations is more important than scattering from surface roughness in commercial samples. However, scattering from contaminants at or near the surface exists and can be reduced by using less Ti diffusant and/or by polishing the finished waveguide. Variations in scattering as a function of propagation direction and mode polarization suggest that the scattering centers are anisotropic with regard to either their refractive index, their shape or both. Diagnostic experiments to ascertain the nature of these scatterers, including electrooptic, photorefractive, and thermal studies, are described.

Paper Details

Date Published: 26 July 1979
PDF: 8 pages
Proc. SPIE 0176, Guided Wave Optical Systems and Devices II, (26 July 1979); doi: 10.1117/12.957220
Show Author Affiliations
David W. Vahey, Battelle Columbus Laboratories (United States)

Published in SPIE Proceedings Vol. 0176:
Guided Wave Optical Systems and Devices II
Elsa M. Garmire, Editor(s)

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