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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 17,
  • Issue 9,
  • pp. 1682-
  • (1999)

High-Density Integrated Optics

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Abstract

This paper presents two-dimensional (2-D) finite difference time domain (FDTD) simulations of low-loss right-angle waveguide bends, T-junctions and crossings, based on high index-contrast waveguides. Such structures are essential for the dense integration of optical components. Excellent performance characteristics are obtained by designing the waveguide intersection regions as low-Q resonant cavities with certain symmetries and small radiation loss. A simple analysis, based on coupled mode theory in time, is used to explain the operation principles and agrees qualitatively with the numerical results.

[IEEE ]

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