Crosstalk Reduction between Closely Spaced Optical Waveguides by Using Higher-Order Modes
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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8
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Physical Review Applied, Volume 18, issue 4, pp. 1-8
Abstract
Optical waveguide structures can make the state-of-the-art micro- and nanofabricated devices faster and less energy consuming. However, on-chip optical components must be placed at relatively large distances from each other, on the order of the wavelength λ, to eliminate the crosstalk between them. This makes on-chip optical structures too large to compete with their electronic counterparts. In this work, we explore the possibility of suppressing the crosstalk between closely spaced dielectric waveguides by making use of higher-order modes. We show that the crosstalk between two waveguides can be essentially eliminated, even if the waveguides are separated by a distance of λ/10 only. We also study arrays of more than two waveguides and find the conditions for the efficient crosstalk reduction in them. Our results can lead to further miniaturization of photonic integrated circuits.Description
Funding Information: This work is funded by the Academy of Finland (308394). A significant part of the numerical calculations was performed using computational resources within the Aalto University School of Science “Science-IT” project. We also acknowledge the Academy of Finland Flagship Programme, Photonics Research and Innovation (Grant No. 320167, PREIN). Publisher Copyright: © 2022 authors. Published by the American Physical Society.
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Maurya, S, Kolkowski, R, Kaivola, M & Shevchenko, A 2022, 'Crosstalk Reduction between Closely Spaced Optical Waveguides by Using Higher-Order Modes', Physical Review Applied, vol. 18, no. 4, 044077, pp. 1-8. https://doi.org/10.1103/PhysRevApplied.18.044077