The On-Chip Solutions to Mode Separation and Crossing of Vertical Multi-Modes in Silicon Waveguide

ZHU Ning; LUO Hui; ZHANG Kai; LIU Qiong; WANG Yang

doi:10.6054/j.jscnun.2020003

Journal of South China Normal University (Natural Science Edition) > 2020 > 52(1): 9-16. > DOI: 10.6054/j.jscnun.2020003

ZHU Ning, LUO Hui, ZHANG Kai, LIU Qiong, WANG Yang. The On-Chip Solutions to Mode Separation and Crossing of Vertical Multi-Modes in Silicon Waveguide[J]. Journal of South China Normal University (Natural Science Edition), 2020, 52(1): 9-16. DOI: 10.6054/j.jscnun.2020003

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The On-Chip Solutions to Mode Separation and Crossing of Vertical Multi-Modes in Silicon Waveguide

Institute of Semiconductor Science and Technology, South China Normal University//Guangdong Engineering Technology Research Center of Optoelectronic Functional Materials and Devices, Guangzhou 510631, China

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Received Date: September 16, 2019
Available Online: March 21, 2021

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Abstract

Abstract

Solutions to mode separation and crossing of vertically distributed multi-modes inside silicon nanophotonic integrated devices are investigated. Mode demultiplexers based on both echelle gratings and asymmetric directional couplers are demonstrated. A device with curved reflectors which allows multi-modes to cross simultaneously is also designed. The simulation results based on the 3D Finite-Difference Time-Domain methods show that the echelle grating allows altogether 9 channels of different modes and wavelengths to be separated with crosstalks no more than -30 dB. The curved reflectors works properly for crossings of three modes, and the crosstalks are merely around -40 dB.
- mode-division-multiplexing,
- vertical multi-mode,
- silicon waveguide,
- mode demultiplexer,
- mode crossing

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References

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