Higher-order mode investigations by intermodal interference in a dual-core photonic crystal fiber

Abstract

This article presents an investigation of the linear optical properties of a dual-core photonic crystal fiber with a square lattice made of a multicomponent glass in a second communication window. An experimental method based on intermodal interference was used to determine the effective refractive indices of higher-order modes, with knowledge of the fundamental mode dispersion. The effective refractive indices were also determined by an FDTD-based simulation and the obtained values provided a good agreement in comparison to the experimental results. The obtained results help to clarify the nonlinear spectral transformation processes observed in the same fiber at propagation in the higher-order modes.

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Correspondence to M. Koys.

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Original Text © Astro, Ltd., 2008.

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Koys, M., Bugar, I., Lorenc, D. et al. Higher-order mode investigations by intermodal interference in a dual-core photonic crystal fiber. Laser Phys. 18, 1153–1158 (2008). https://doi.org/10.1134/S1054660X08100083

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PACS numbers

  • 42.81.Cn
  • 42.81.Gs
  • 42.81.Qb