On the validity of the effective-index method for rectangular dielectric waveguides

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The effective-index method (EIM) for rectangular dielectric waveguides is derived as an approximation from an exact equivalent-network formulation. It is explained why EIM gives accurate results for the fundamental modes in near-cutoff region as well as for all the guided modes in well-guiding region. As a direct improvement on EIM a simple eigenvalue equation is presented, which takes into account the shape of the predominant slab-waveguide mode. Besides, it is shown that EIM overestimates propagation constants compared to the improved results.
Publisher
Institute of Electrical and Electronics Engineers Inc.
Issue Date
1993-08
Language
English
Article Type
Article
Keywords

EQUIVALENT-NETWORK ANALYSIS; WAVE-GUIDES; MODE

Citation

JOURNAL OF LIGHTWAVE TECHNOLOGY, v.11, no.8, pp.1320 - 1324

ISSN
0733-8724
URI
http://hdl.handle.net/10203/56776
Appears in Collection
EE-Journal Papers(저널논문)
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