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Improved optical coupling in waveguide photodetectors incorporating a wedge-shaped input facet

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Abstract

A simple method for improving the input coupling in uncleaved waveguide photodetectors is demonstrated. A wedge-shaped recess is incorporated into the input facet to reduce reflection. Over a range of device sizes and wedge shapes, mean quantum efficiency was increased by 16% relative to flat, uncleaved input facets.

© 2002 Optical Society of America

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