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Broadband Optical Add-Drop Filters Enabled by Silicon Photonic Sub-wavelength-grating-assisted Waveguides

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Abstract

We present the design of silicon optical add-drop filters made using sub-wavelength-grating-assisted, contra-directional couplers. We demonstrate that such devices can have broad bandwidths, up to 45 nm, while maintaining low losses and high out-of-band isolations.

© 2023 The Author(s)

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