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Efficient Conversion to Very High Order Modes in Silicon Waveguides

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Abstract

We demonstrate robust mode conversion up to the 12th higher order mode in silicon waveguides by using an optimized adiabatic directional coupler and using subwavelength waveguides. The conversion efficiency is better than -1.5 dB over a 75 nm bandwidth and tolerating ±30 nm fabrication variations.

© 2019 The Author(s)

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