Abstract

We demonstrate second-harmonic generation (SHG) from sub-micrometer-sized AlGaAsAlxOy artificially birefringent waveguides. The normalized conversion efficiency is the highest ever reported. We further enhanced the SHG using a waveguide-embedded cavity formed by dichroic mirrors. Resonant enhancements as high as 10× were observed. Such devices could be potentially used as highly efficient, ultracompact frequency converters in integrated photonic circuits.

© 2006 Optical Society of America

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