Abstract
Asymmetrical directional couplers aided with subwavelength sidewall corrugations are used to realize ultra-compact silicon mode (de)multiplexers at C-band. Three mode (de)multiplexers with ultra-short coupling lengths of 5.6/6.5/7.7
μ
m are designed to enable low-loss mode conversions between TE0 and TE1/2/3 modes. They are then cascaded to build a four-channel mode-division-multiplexing (MDM) link. The four mode channels present minimal on-chip insertion losses of 0.2/0.7/0.7/0.9 dB at their peak wavelengths. Measured cross talk levels of the four mode channels are better than −18.0/−19.1/−16.0/−18.2 dB within the wavelength range from 1530 nm to 1580 nm.
Funder
800G optical transceiver chip and photonics engine of Zhejiang Lab
Science and Technology Innovation 2025 Major Project of Ningbo
National Key Research and Development Program of China
Subject
Atomic and Molecular Physics, and Optics
Cited by
9 articles.
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