Abstract

A technique is described that allows accurate measurement of input prism coupling efficiencies in single-mode channel waveguides. Coupling efficiencies of <1% were measured. Scattering and absorption losses were also measured in single-mode channel waveguides and in planar diffused waveguides. All measurements were made in Ti-in-diffused LiNbO3 waveguides. The channel widths before diffusion were 3 μm. Losses for channel waveguides range from 1.34 to 1.66 dB/cm and were measured for both TE and TM modes.

© 1980 Optical Society of America

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