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Ultracompact CWDM Filter Based on Phase-Change Photonic Crystal Resonators

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Abstract

An ultracompact photonic crystal channel-drop filter based on a square-shaped dual-loop resonator configuration is proposed in this paper. Four coarse wavelength-division multiplexing (CWDM) channels at 1550 nm, 1570 nm, 1590 nm, and 1610 nm can be dropped with high transmission efficiency simultaneously. The device size of the proposed photonic crystal filter can be reduced to about 296 μm2 because the resonator acts as a channel splitter and dropper at the same time. Furthermore, the two cascaded resonator rings have the same dimension parameters, such as lattice constant and rod radius, which facilitates device fabrication. By simply tuning the refractive index of selected phase change material rods, specific dropping wavelengths can be obtained. The proposed phase-change photonic crystal channel drop filter will have important applications in future photonic integrated circuit-based optical communication systems. The device configuration also provides an important reference for the design of reconfigurable photonic switches and routers.

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Authors and Affiliations

  1. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, School of Communication and Information Engineering, Shanghai University, Shanghai, 200444, China

    Juan Zhang, Mengxiang Zhang & Mingwei Zhao

  2. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China

    Yang Wang

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  1. Juan Zhang
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  2. Mengxiang Zhang
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  3. Mingwei Zhao
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  4. Yang Wang
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Correspondence to Juan Zhang.

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Zhang, J., Zhang, M., Zhao, M. et al. Ultracompact CWDM Filter Based on Phase-Change Photonic Crystal Resonators. J. Electron. Mater. 50, 7078–7084 (2021). https://doi.org/10.1007/s11664-021-09212-z

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  • DOI: https://doi.org/10.1007/s11664-021-09212-z

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