Abstract

A mode-matching method is applied for precise numerical analysis of the propagation characteristics of a four-layer thin-film optical waveguide with a plano-convex layer, whose accurate description has been difficult so far. In the computation, the effects of the buffer layer on the dispersion relation and the field distribution for a few lower-order modes are investigated.

© 1982 Optical Society of America

Optical rectangular waveguide in titanium-diffused lithium niobate having its optical axis in the transverse plane

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