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      • Dept. of Electrical and Electronics Engineering - Master's degree
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      •   BUIR Home
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      • Bilkent Theses
      • Theses - Department of Electrical and Electronics Engineering
      • Dept. of Electrical and Electronics Engineering - Master's degree
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      Analysis of dielectric waveguide bends and curved coupler structures using finite difference beam propagation method

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      Author(s)
      Ofli, Erdem
      Advisor
      Altıntaş, Ayhan
      Date
      1997
      Publisher
      Bilkent University
      Language
      English
      Type
      Thesis
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      Abstract
      In this thesis, implicit finite difference beam propagation method based on Crank Nicholson discretization procedure is implemented and applied to the analysis of propagation of optical beams in an orthogonal bend and a curved coupler structure. The efficiency factor which accounts for the power loss as a result of the bend is calculated for different waveguide width values and compiired with analytic solutions in the analysis of the orthogonal bend. Also, the effect of the rotation of the etched semiconductor-air interface from its ideal position is examined. In the curved coupler analysis, the bend loss and the variation of lower transfer ratios for different values of minimum distance that separates the branches of the structure are investigated and compared with analytic solutions. On both structure, the evolution of the Gaussian beam in the positive ^-direction is obtained.
      Keywords
      Beam Propagation Method
      Photonic Integrated Circuits
      Waveguide Couplers
      Optical Waveguide Bends
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      http://hdl.handle.net/11693/17987
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      • Dept. of Electrical and Electronics Engineering - Master's degree 655
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