Abstract

We employ the propagating-beam method to determine the increase in coupling efficiency that is achievable if the end of a two-dimensional monomode taper is rounded before it is placed in front of a semiconductor laser. We find that the coupling efficiency in some cases can be augmented by more than a factor of 2. Subsequently, we describe some results that relate to three-dimensional taper structures and couplers built of two taper structures placed with their wide ends adjacent.

© 1984 Optical Society of America

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