Abstract

An integrated optical half adder circuit was fabricated on LiNbO₃ substrate. The circuit is composed of several elementary logic gates. Interaction between guided light beams was achieved by utilizing LiNbO₃ electrooptic modulators, which operate by changing the cutoff condition of the lowest order guided mode in an outdiffused LiNbO₃ channel waveguide, and CdS photodetectors. Light signals were injected into an array of channel waveguides by end-fire coupling from an array of four single mode optical fibers arranged in preferentially etched V-grooves in silicon.

© 1979 Optical Society of America

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