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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 10, Iss. 2 — Feb. 1, 1985
  • pp: 86–88

Prediction of coupling length in a rectangular-core directional coupler: an accurate analysis

Arun Kumar, A. N. Kaul, and A. K. Ghatak  »View Author Affiliations


Optics Letters, Vol. 10, Issue 2, pp. 86-88 (1985)
http://dx.doi.org/10.1364/OL.10.000086


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Abstract

It is shown that, for rectangular-core directional couplers, Marcatili's widely used analysis [Bell Syst. Tech. J. 48, 2071 (1969)] predicts almost the same value of coupling length as that obtained by the simple slab-waveguide approximation. A more accurate analysis, which takes the effect of corner regions into account through first-order perturbation theory, shows that Marcatili's analysis may lead to inaccurate results for small values of depths of channel waveguides, which are the most practical directional couplers involving single-mode channel waveguides.

© 1985 Optical Society of America

History
Original Manuscript: September 27, 1984
Manuscript Accepted: November 26, 1984
Published: February 1, 1985

Citation
Arun Kumar, A. N. Kaul, and A. K. Ghatak, "Prediction of coupling length in a rectangular-core directional coupler: an accurate analysis," Opt. Lett. 10, 86-88 (1985)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-10-2-86

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