Finite element modeling of dielectric waveguides Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/5q47rs43b

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  • Dielectric waveguides are becoming important for their numerous applications in integrated optics. The study of dielectric waveguides by analytical techniques is not sufficient for many variations in waveguide shape, anisotropy, and inhomogeneity commonly encountered in waveguide materials. This work studies the finite element method as an accurate tool for the numerical modeling of dielectric waveguides. Other commonly used numerical techniques are also considered. The implementation of the finite element method is discussed. The finite element technique is also modified to incorporate the lack of fixed-potential boundary conditions in dielectric waveguides. The results of the simulations are documented for several experimental and analytical test cases. Measurements were made on waveguides fabricated in-house using the plasma-enhanced chemical vapor deposition (PECVD) films of silicon oxynitride. The light source was a 6328 A helium-neon laser. The results of the finite element simulations are compared with the experimental results and with other previously documented numerical and analytical results from the literature. The finite element method developed here is shown to be in good agreement with these results and will be useful in solving for the modes of novel waveguide designs.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-01-31T20:31:16Z (GMT) No. of bitstreams: 1 VishakhadattaGannavaram1993.pdf: 2564278 bytes, checksum: cffb197503da63772675d2fcdfd70504 (MD5)
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