Articles | Volume 8
Adv. Radio Sci., 8, 19–26, 2010
https://doi.org/10.5194/ars-8-19-2010
Adv. Radio Sci., 8, 19–26, 2010
https://doi.org/10.5194/ars-8-19-2010

  30 Sep 2010

30 Sep 2010

Using quasi-guided modes for modeling the transfer behavior of bent dielectric slab waveguides

M. Stallein, B. Bandlow, and R. Schuhmann M. Stallein et al.
  • Universität Paderborn, Theoretische Elektrotechnik, Warburger Strasse 100, 33098 Paderborn, Germany

Abstract. The connection of two straight dielectric multimode slab waveguides by a circular bent waveguide is analyzed by means of quasi-guided modes. These modes correspond to the well known leaky modes, but own real eigenvalues, thus the mathematical description is simpler. Furthermore they are derived as approximate solutions of the exact theory. This work will first give a brief introduction to the basic theory, followed by a discussion of the properties of quasi-guided modes. After a validation by comparison with a numerical simulation using the Finite Integration Technique, results for the bending loss of multimode waveguides are presented.