Abstract

Diffused channel-waveguide couplers were fabricated on z-cut y-propagating LiNbO₃ crystals by the indiffusion of titanium. Both mode spot sizes and coupling lengths were measured. The fields and coupling lengths were computed for both TM and TE polarizations from fabrication conditions. Good agreement was obtained between the measured and computed mode spot sizes and coupling lengths. It is concluded that the calculation method could aid in the design of such couplers.

© 1983 Optical Society of America

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