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Journal of Lightwave Technology,
vol. 14, pp. 223–228, 1996
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Effective-Index Method with Built-In Perturbation Correction
for Integrated Optical Waveguides
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Kin Seng Chiang, Kai Ming Lo,
and Kam Shing Kwok
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Abstract:
It is well known that the conventional
effective-index method for the analysis of rectangular-core
waveguides can in general produce accurate results only when
the modes of the waveguides are operated in the far-from-cutoff region.
In this paper, an improved effective-index method, called the
effective-index method with built-in perturbation correction,
is described. This method is as efficient as the conventional
method yet produces much more accurate results.
Numerical examples for single waveguides and directional
couplers are presented to demonstrate the accuracy of the method
with results obtained from an improved Fourier decomposition
method as the references.