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Coarse Wavelength Division Multiplexing (CWDM) allows for the concurrent transmission of several data channels over a single optical fiber, with each channel modulated to a unique wavelength in the CDF. This is a crucial step in extracting particular data streams without interference between channels. In this paper, a two-dimensional (2D) photonic crystal (PhC) structure based on a photonic Crystal Ring Resonator (PCRR) is proposed. The design is optimized by varying the coupling rod radius between 0.08 µm and 0.12 µm. The device operates efficiently in the wavelength range of 1.45–1.5 µm. The proposed filter is highly compact, making it particularly suitable for applications with stringent space constraints. The Transmission Efficiency of the proposed PhC filter surpasses that of recently developed filters, achieving 100% efficiency, which is a significant improvement. The use of a unique rectangular 4 × 5 structure further distinguishes this design from existing PhC filters, highlighting its innovative characteristics.

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A Reconfigurable Channel Drop Filter Using 2D Photonic Crystal Ring Resonators for WDM Systems

  • 会议论文

  • 发表日期：

    2026年

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  • Shneur Sholi Jhirad,
  • S. Sri Priya,
  • S. Selvendran

摘要

Coarse Wavelength Division Multiplexing (CWDM) allows for the concurrent transmission of several data channels over a single optical fiber, with each channel modulated to a unique wavelength in the CDF. This is a crucial step in extracting particular data streams without interference between channels. In this paper, a two-dimensional (2D) photonic crystal (PhC) structure based on a photonic Crystal Ring Resonator (PCRR) is proposed. The design is optimized by varying the coupling rod radius between 0.08 µm and 0.12 µm. The device operates efficiently in the wavelength range of 1.45–1.5 µm. The proposed filter is highly compact, making it particularly suitable for applications with stringent space constraints. The Transmission Efficiency of the proposed PhC filter surpasses that of recently developed filters, achieving 100% efficiency, which is a significant improvement. The use of a unique rectangular 4 × 5 structure further distinguishes this design from existing PhC filters, highlighting its innovative characteristics.