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<p>Optical microring resonators have a large scope in research due to on-chip photonic applications and compatibility with CMOS fabrication technology. In this paper, a multi-input-output waveguide port-based optical filter having a high free spectral range (FSR), a great Q-factor, and an optimum utilization of filter area design approach is proposed. The proposed optical filter focuses on the performance analysis of a single-input, three-output wavelength-selective pentuple optical microring resonator (POMRR) filter. The mathematical modeling of POMRR is done using delay line signal processing, where a unit delay is represented by <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:{z}^{-1}\)</EquationSource> </InlineEquation>. The novelty of the proposed filter design approach is focused on reducing the size and increasing the Q-factor and FSR (free spectral range). To address the compact size, high Q-factor, and wide FSR, four smaller rings are housed inside the outer microring. The frequency response analysis is done in MATLAB software, and the obtained FSRs are 1460 THz, 3870 THz, and 7654 THz &amp; Q-factors are 34,740, 12142.5, and 6400. The field analysis is done using OptiFDTD software.</p>

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Performance investigation of terahertz FSR compact 1 × 3 input-output pentuple optical filter

  • 期刊论文

  • 发表日期：

    2026年2月27日

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  • Pankaj Kumar Ray,
  • Suman Ranjan

摘要

Optical microring resonators have a large scope in research due to on-chip photonic applications and compatibility with CMOS fabrication technology. In this paper, a multi-input-output waveguide port-based optical filter having a high free spectral range (FSR), a great Q-factor, and an optimum utilization of filter area design approach is proposed. The proposed optical filter focuses on the performance analysis of a single-input, three-output wavelength-selective pentuple optical microring resonator (POMRR) filter. The mathematical modeling of POMRR is done using delay line signal processing, where a unit delay is represented by \(\:{z}^{-1}\) . The novelty of the proposed filter design approach is focused on reducing the size and increasing the Q-factor and FSR (free spectral range). To address the compact size, high Q-factor, and wide FSR, four smaller rings are housed inside the outer microring. The frequency response analysis is done in MATLAB software, and the obtained FSRs are 1460 THz, 3870 THz, and 7654 THz & Q-factors are 34,740, 12142.5, and 6400. The field analysis is done using OptiFDTD software.