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Broadband and compact contradirectional coupler with subwavelength grating waveguides

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Abstract

We proposed a new broadband contradirectional coupler composed by subwavelength grating (SWG) waveguides on silicon-on-insulator wafer. The 3-dB bandwidth can reach up to 29 nm and the length of coupling region is only 50 μm.

© 2017 Optical Society of America

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