An Ultracompact Multimode Waveguide Crossing Based on Subwavelength Asymmetric Y-Junction

We propose and experimentally demonstrate a novel ultracompact multimode waveguide crossing. The compact asymmetric subwavelength Y-junction is introduced to convert the high-order modes into fundamental ones, enabling one to implement three or more modes simultaneously in the subsequent processing....

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Bibliographic Details
Published in:IEEE photonics journal 2018-08, Vol.10 (4), p.1-8
Main Authors: Chang, Weijie, Lu, Luluzi, Ren, Xinshu, Lu, Longhui, Cheng, Mengfan, Liu, Deming, Zhang, Minming
Format: Article
Language:English
Subjects:
Bars
Integrated optics devices
metamaterials
mode-division multiplexing
Optical waveguides
Performance evaluation
Photonics
Scanning electron microscopy
Silicon
Wavelength measurement
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Summary:We propose and experimentally demonstrate a novel ultracompact multimode waveguide crossing. The compact asymmetric subwavelength Y-junction is introduced to convert the high-order modes into fundamental ones, enabling one to implement three or more modes simultaneously in the subsequent processing. Our proposed device occupied only a compact footprint of 34 × 34 μm 2 . The measured results indicate our fabricated device exhibited a high performance with the insertion loss less than 0.9 dB, crosstalk lower than -24 dB from 1.52 to 1.60 μm for all the three modes. Moreover, our scheme could be easily expended to implement more modes and will show great potential in dense and large-scale on-chip photonic integration.
ISSN:1943-0655
1943-0647
DOI:10.1109/JPHOT.2018.2847762