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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 5, Iss. 6 — Jun. 1, 1988
  • pp: 782–792

Asymptotic theory of guided modes in two parallel, identical dielectric waveguides

Zi Hua Wang and S. R. Seshadri  »View Author Affiliations


JOSA A, Vol. 5, Issue 6, pp. 782-792 (1988)
http://dx.doi.org/10.1364/JOSAA.5.000782


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Abstract

The guided modes supported by two parallel, identical planar dielectric waveguides are investigated exactly by a quasi-optical technique and approximately by using the improved coupled-mode theory. The wave numbers obtained by the two methods are expanded into asymptotic series in terms of a suitable small parameter. By comparing the asymptotic series obtained by the two methods term by term, it is shown that the improved coupled-mode theory is asymptotically exact in the limit of weak coupling and not so in the strong-coupling regime. The merits and the defects of the improved coupled-mode theory are discussed.

© 1988 Optical Society of America

History
Original Manuscript: September 25, 1987
Manuscript Accepted: January 27, 1988
Published: June 1, 1988

Citation
Zi Hua Wang and S. R. Seshadri, "Asymptotic theory of guided modes in two parallel, identical dielectric waveguides," J. Opt. Soc. Am. A 5, 782-792 (1988)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-5-6-782

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