Comparative analysis of the method-of-lines for three-dimensional curved dielectric waveguides

We discuss the effects of waveguide geometry on the radiation loss of tightly curved multimode dielectric waveguides. Three waveguide geometries are investigated: a ridge waveguide, a buried waveguide, and an interdiffused waveguide. We compare the effective index method with both semi- and full-vec...

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Bibliographic Details
Published in:Journal of lightwave technology 1996-02, Vol.14 (2), p.209-216
Main Authors: Burton, R.S., Schlesinger, T.E.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Dielectric losses
Electric, optical and optoelectronic circuits
Electromagnetic propagation
Electromagnetic waveguides
Electronics
Exact sciences and technology
Geometry
Integrated optics
Integrated optics. Optical fibers and wave guides
Optical and optoelectronic circuits
Optical design
Optical losses
Optical waveguides
Resonance
Signal design
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Summary:We discuss the effects of waveguide geometry on the radiation loss of tightly curved multimode dielectric waveguides. Three waveguide geometries are investigated: a ridge waveguide, a buried waveguide, and an interdiffused waveguide. We compare the effective index method with both semi- and full-vectorial method-of-lines analyses for these waveguide geometries. This comparison shows that the effective index method is accurate for curved waveguides except where the outer confinement region is in cut-off or, in the case of TM-polarization, for the ridge waveguide. In the latter case, the full-vectorial method-of-lines predicts a resonant feature of the TM-mode radiation loss of curved ridge waveguides; this is not predicted by either the semivectorial method-of-lines or the effective index method.
ISSN:0733-8724
1558-2213
DOI:10.1109/50.482265