Abstract

An optical multimode 3-branched waveguide in Ti-diffused Z-cut LiNbO3 is discussed experimentally and theoretically. The guided light was selectively fed into three branches with the extinction ratio of nearly 10 dB at an applied voltage of V0 = ±25 V. As an example of the applications, we propose a 4-port optical switch which consists of 3-branched waveguides and bent waveguides. The bent waveguide with a 0.5-mm radius of curvature was fabricated in Nb2O5/Ti:LiNbO3.

© 1980 Optical Society of America

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