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<p>In this paper, we propose a novel and general approach for designing flat-top (de)multiplexers, particularly (de)interleavers, utilizing a Photonic Crystal Mach-Zehnder Interferometer (PC-MZI) based on multimode interference (MMI). We demonstrate the design and performance of 4-, 6-, 8-, and 16-channel PC-MZI (de)interleavers with minimal loss, low crosstalk, and a flat-top transmission spectrum achieved through a hexagonal photonic crystal structure. Simulation results at a central wavelength of 1.55 <i>µm</i> reveal 1 dB and 3 dB bandwidths of 3.3 <i>nm</i> and 7 <i>nm</i> for the 4-channel, 8.1 <i>nm</i> and 14 <i>nm</i> for the 6-channel, and 2.5 <i>nm</i> and 4.3 <i>nm</i> for the 16-channel (de)interleavers, respectively. Furthermore, the 16-channel device exhibits channel spacing of 11 <i>nm</i> between adjacent channels and 22 <i>nm</i> for non-adjacent channels separated by one intervening channel. Finally, we achieve power losses ranging from 0.05 dB to 3 dB and channel isolation between − 10 dB and − 22 dB.</p>

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Conceptual design of multimode interference-based photonic crystal Mach-Zehnder interferometer (de)interleavers

  • 期刊论文

  • 发表日期：

    2025年2月14日

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  • Masoud Kamran,
  • Kambiz Abedi

摘要

In this paper, we propose a novel and general approach for designing flat-top (de)multiplexers, particularly (de)interleavers, utilizing a Photonic Crystal Mach-Zehnder Interferometer (PC-MZI) based on multimode interference (MMI). We demonstrate the design and performance of 4-, 6-, 8-, and 16-channel PC-MZI (de)interleavers with minimal loss, low crosstalk, and a flat-top transmission spectrum achieved through a hexagonal photonic crystal structure. Simulation results at a central wavelength of 1.55 µm reveal 1 dB and 3 dB bandwidths of 3.3 nm and 7 nm for the 4-channel, 8.1 nm and 14 nm for the 6-channel, and 2.5 nm and 4.3 nm for the 16-channel (de)interleavers, respectively. Furthermore, the 16-channel device exhibits channel spacing of 11 nm between adjacent channels and 22 nm for non-adjacent channels separated by one intervening channel. Finally, we achieve power losses ranging from 0.05 dB to 3 dB and channel isolation between − 10 dB and − 22 dB.