Abstract
A dual-mode waveguide crossing is proposed and realized for the application of on-chip multimode interconnection. The present structure is realized by two 90° crossed multimode-interference (MMI) couplers. By properly choosing the width and length of the MMI section, the self-images for both the incident mode and the mode could be at the center of the crossing. The characterization results for the fabricated device show that low insertion loss below and low crosstalk below can be achieved over a large bandwidth more than 80 nm for both the and modes.
© 2016 Optical Society of America
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