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<p>This paper presents a novel approach for designing and analyzing a triplet optical microring resonator (TOMRR) -based optical filter. The proposed TOMRR is mathematically modelled in the z-domain using a delay line signal processing technique, where microrings are assumed to be composed of several unit delays. In this proposed TOMRR, smaller asymmetrical microrings are housed inside a larger microring to improve the space utilization factor. Asymmetrical microrings are used to increase the free spectral range (FSR) according to Vernier principle. An attempt is made to increase the FSR by increasing the number of microrings (MRRs), and it is found that the FSR increases sharply as the number of MRRs increases. The frequency response analysis of the proposed configuration is done using MATLAB software, and the obtained FSR values for the single ring, double ring, and TOMRR are 36&#xa0;THz, 166&#xa0;THz, and 541.4&#xa0;THz, respectively. The design of the directional coupler, as well as the field analysis of the proposed configuration, is done using OptiFDTD software to depict the electromagnetic wave propagation inside the waveguide.</p>

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Design and performance analysis of triplet optical microring resonator as an optical filter

  • 期刊论文

  • 发表日期：

    2026年4月7日

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  • Pankaj Kumar Ray,
  • Suman Ranjan

摘要

This paper presents a novel approach for designing and analyzing a triplet optical microring resonator (TOMRR) -based optical filter. The proposed TOMRR is mathematically modelled in the z-domain using a delay line signal processing technique, where microrings are assumed to be composed of several unit delays. In this proposed TOMRR, smaller asymmetrical microrings are housed inside a larger microring to improve the space utilization factor. Asymmetrical microrings are used to increase the free spectral range (FSR) according to Vernier principle. An attempt is made to increase the FSR by increasing the number of microrings (MRRs), and it is found that the FSR increases sharply as the number of MRRs increases. The frequency response analysis of the proposed configuration is done using MATLAB software, and the obtained FSR values for the single ring, double ring, and TOMRR are 36 THz, 166 THz, and 541.4 THz, respectively. The design of the directional coupler, as well as the field analysis of the proposed configuration, is done using OptiFDTD software to depict the electromagnetic wave propagation inside the waveguide.