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On-chip hybrid demultiplexer for mode and coarse wavelength division multiplexing

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Abstract

We propose a hybrid demultiplexer for mode and coarse wavelength division multiplexing on silicon-on-insulator (SOI) nanowires and photonic crystal (PhC) slab. First, a V-shape waveguide–cavity–waveguide filter based on PhC slab is presented. Coupling of resonant modes is introduced to the filter to suppress the crosstalk caused by connection with nanowires. Then, we cascade and optimize the filter to compose a coarse wavelength division demultiplexer. After that, a hybrid demultiplexer is constructed by combining the coarse wavelength division demultiplexer on PhC slab and mode division demultiplexer on SOI nanowires. The parameters of the hybrid demultiplexer are calculated using three-dimensional finite-difference time-domain (3D-FDTD) method. The numerical results show that the fundamental transverse electric (\(\hbox {TE}_0\)) modes and the first-order TE (\(\hbox {TE}_1\)) modes of 1530 nm and 1550 nm can be demultiplexed. The insertion loss is smaller than 2.0 dB, and the channel crosstalk is less than − 25 dB. The hybrid demultiplexer can be applied in a system that using mode and coarse wavelength division multiplexing simultaneously.

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Acknowledgements

This work is supported in part by the National Natural Science Foundation of China (No. 61571237), in part by the Natural Science Foundation of Jiangsu Province of China (No. BK20151509), and in part by Postgraduate Research & Practice Innovation Program of Jiangsu Province (No. \(\mathrm{KYZZ16}_{-}0251\), No. \(\mathrm{KYLX15}_{-}0835\)).

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Authors and Affiliations

  1. Department of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China

    Yuyang Zhuang, Ke Ji & Yuchen Hu

  2. Department of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China

    Yuyang Zhuang, Ke Ji & Yuchen Hu

  3. Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China

    Heming Chen

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  1. Yuyang Zhuang
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  2. Heming Chen
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Correspondence to Heming Chen.

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Zhuang, Y., Chen, H., Ji, K. et al. On-chip hybrid demultiplexer for mode and coarse wavelength division multiplexing. Appl. Phys. B 125, 12 (2019). https://doi.org/10.1007/s00340-018-7123-6

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  • DOI: https://doi.org/10.1007/s00340-018-7123-6

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