Efficient TE-Polarized Mode-Order Converter Based on High-Index-Contrast Polygonal Slot in a Silicon-on-Insulator Waveguide

Efficient TE-Polarized Mode-Order Converter Based on High-Index-Contrast Polygonal Slot in a Silicon-on-Insulator Waveguide

We proposed a new type of transverse electric (TE) polarized mode-order converter based on a deeply-etched polygonal slot on a silicon-on-insulator waveguide. Along the transverse direction of the waveguide, two irregular boundary surfaces of the slot can introduce high-contrast index modulation on...

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Veröffentlicht in:IEEE photonics journal 2019-04, Vol.11 (2), p.1-10
Hauptverfasser: Hao, Lijun, Xiao, Rulei, Shi, Yuechun, Dai, Pan, Zhao, Yong, Liu, Shengping, Lu, Jun, Chen, Xiangfei
Format: Artikel
Sprache:eng
Schlagworte:
Converters
Crosstalk
Division
Geometry
Indexes
Integrated optics devices
Interference
mode conversion
Modulation
Multiplexing
Optical waveguides
Refractive index
Silicon
silicon photonics
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Zusammenfassung:We proposed a new type of transverse electric (TE) polarized mode-order converter based on a deeply-etched polygonal slot on a silicon-on-insulator waveguide. Along the transverse direction of the waveguide, two irregular boundary surfaces of the slot can introduce high-contrast index modulation on guided modes, leading to multimode interference in the slot. Therefore, when the slot is optimized, we can achieve efficient mode conversions based on the multimode interference. As examples, mode converters from the fundamental TE mode (TE0) to the first-order TE mode (TE1) and to the second-order TE mode (TE2) have both been demonstrated with a short device length (97.6%), and a low modal crosstalk (
ISSN:1943-0655
1943-0655
1943-0647
DOI:10.1109/JPHOT.2019.2907640