Silicon integrated multi-mode ring resonator

Ring resonator is an essential element in silicon integrated circuit, it is widely used as filter, wavelength multiplexer and switch in single-mode operation regime. As the rapid development of mode division multiplexing (MDM) technique, ring resonator that can process multi-mode signals simultaneou...

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Bibliographic Details
Published inNanophotonics (Berlin, Germany) Vol. 10; no. 2; pp. 1265 - 1272
Main Authors Ye, Mengyuan, Sun, Chunlei, Yu, Yu, Ding, Yunhong, Zhang, Xinliang
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 18.01.2021
Walter de Gruyter GmbH
Subjects
Design
Geometrical optics
Integrated circuits
integrated optics devices
Laboratories
Light
multi-mode
Multiplexers
Multiplexing
Optics
Photonics
Resonators
ring resonator
Semiconductors
Signal processing
Silicon
Single mode operation
Waveguides
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Summary:Ring resonator is an essential element in silicon integrated circuit, it is widely used as filter, wavelength multiplexer and switch in single-mode operation regime. As the rapid development of mode division multiplexing (MDM) technique, ring resonator that can process multi-mode signals simultaneously and uniformly is highly desired. However, the severe modal dispersion makes identical transmission for different modes very hard. In this paper, by breaking through the limitation of conventional multi-mode manipulation design with evanescent coupling or mode interference, we propose and demonstrate a multi-mode ring resonator (MMRR) inspired by the free space geometric optics. Arbitrary number of supporting modes can be achieved by simply widening the waveguide width. For proof-of-concept demonstration, an MMRR supporting four modes is fabricated with uniform transmittance. Furthermore, architecture of cascaded four MMRRs are also demonstrated experimentally.
ISSN:2192-8606
2192-8614
DOI:10.1515/nanoph-2020-0556