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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 8, Iss. 9 — Apr. 23, 2001
  • pp: 517–528

A study of high-index-contrast 90° waveguide bend structures

R. L. Espinola, R. U. Ahmad, F. Pizzuto, M. J. Steel, and R. M. Osgood, Jr.  »View Author Affiliations

Optics Express, Vol. 8, Issue 9, pp. 517-528 (2001)

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We present an evaluation of the parameters involved in designing low-loss right-angle waveguide bends based on a high index contrast materials system. We apply the finite difference time domain method (FDTD)to several two-dimensional bend structures and study the effects of varying the bend geometry. Such a study is relevant for the understanding of bend mechanisms and for the optimization and fabrication of high-density high-contrast integrated optical components. The study indicates that high bend transmission can be achieved with the addition of a low-Q resonant cavity; however, similar or even better performance can be achieved with a structure that combines a corner mirror with a phase retarder. The use of a double corner mirror structure is shown to further increase the bend transmission, with little increase in bend area.

© Optical Society of America

OCIS Codes
(130.0130) Integrated optics : Integrated optics
(220.0220) Optical design and fabrication : Optical design and fabrication

ToC Category:
Research Papers

Original Manuscript: March 29, 2001
Published: April 23, 2001

Richard Espinola, R. Ahmad, F. Pizzuto, Michael Steel, and Richard Osgood, "A study of high-index-contrast 90 degree waveguide bend structures," Opt. Express 8, 517-528 (2001)

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