Higher order mode conversion induced by discontinuities in waveguides


  • Jesus Pablo Lauterio-Cruz Universidad de Sonora
  • J. Manzanares Martínez Universidad de Sonora
  • J. A. Gaspar Armenta Universidad de Sonora




Waveguide discontinuities; mode conversion; Fourier transforms; FDTD method; high-order modes


In this paper, we provide a theoretical prediction about the likelihood of producing high-order modes using, as far as we know, the simplest mode converter. The mode converter is a simple discontinuous waveguide for which reflection and transmission have recently been reported. As a result of the scattering of the fundamental guided mode (TE0), we have found that the high-order mode excitation is highly dependent on the position of the discontinuity. On the one hand, we discovered that in the presence of a discontinuity in the propagation direction, only even modes (TE0 and TE2) are excited, skipping the odd mode (TE1). When a lateral shift is considered, however, both even and odd higher-order modes (TE1 and TE2) are generated. Furthermore, after some lateral shifting, we found that only the pure TE2 mode is propagated.


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How to Cite

J. P. Lauterio-Cruz, J. Manzanares Martínez, and J. A. Gaspar Armenta, “Higher order mode conversion induced by discontinuities in waveguides”, Rev. Mex. Fís., vol. 69, no. 5 Sep-Oct, pp. 051301 1–, Sep. 2023.