Abstract

In this paper, we propose a new evaluation concept for characterizing multimode optical branching waveguides. We introduce a ray tracing technique to simulate multimode branching waveguides and a phase space expression with the ray position and slope to describe the modal distribution of output light. We have used this technique for branching waveguides, which have a parabolic distributed-index and clarified branching characteristics. Experimental results obtained for diffused branching waveguides are compared to calculation.

© 1986 Optical Society of America

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