Signal propagation within multimode waveguides with rectangular cross sections is modeled by an approximative determination of the propagating modes. Precondition for the approach is a small difference between the refractive indices of the waveguide's core and cladding leading to a small numerical aperture. The approximation yields good results for modes far away from cutoff. As the roughness between core and cladding of real board-integrated waveguides results in a stronger attenuation of the higher order modes compared to the modes of lower order, the approximation seems to be well suited for modeling this kind of waveguides.
Modeling of optical multimode waveguides
2005-01-01
688732 byte
Conference paper
Electronic Resource
English
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