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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 25, Iss. 13 — Jul. 1, 1986
  • pp: 2169–2174

Dual effective-index method for the analysis of rectangular dielectric waveguides

K. S. Chiang  »View Author Affiliations


Applied Optics, Vol. 25, Issue 13, pp. 2169-2174 (1986)
http://dx.doi.org/10.1364/AO.25.002169


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Abstract

Two different approximations for the propagation constant of a guided mode in a rectangular dielectric waveguide can be obtained by applying the conventional effective-index method to the waveguide in two different ways. By combining these two approximations with the other two approximations for a complementary mode in a complementary waveguide so that the errors in the approximations can be largely canceled, a more accurate approximation can be derived. Numerical results from analyzing several basic rectangular structures reveal that in most cases the new technique is considerably more accurate than the conventional effective-index method and does not generate ambiguous results as the conventional effective-index method does in the analysis of square dielectric rods.

© 1986 Optical Society of America

History
Original Manuscript: December 27, 1985
Published: July 1, 1986

Citation
K. S. Chiang, "Dual effective-index method for the analysis of rectangular dielectric waveguides," Appl. Opt. 25, 2169-2174 (1986)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-25-13-2169

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