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Ultracompact and broadband wavelength (de)multiplexer based on asymmetrical directional coupler with subwavelength grating

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Abstract

We demonstrate an ultracompact (~9 μm) wavelength demultiplexer based on SWG-assisted asymmetrical directional coupler. Low loss (< 0.2 dB) and high extinction ratio (> 19 dB) are obtained for almost the whole O-band and C-band.

© 2021 The Author(s)

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