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Modal cutoff properties of a fiber with a trefoil cross section under the weak guidance approximation

✍ Scribed by Alka Sharma; P. Khastgir; O. N. Singh

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
125 KB
Volume
16
Category
Article
ISSN
0895-2477

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✦ Synopsis

In this paper, we present a theoretical analysis of the propagation of electromagnetic wa¨es through a fiber with a trefoil cross section. This may be regarded as a preliminary study of a wa¨eguide in which three cores are embedded in a common cladding. By choosing an appropriate coordinate system, the scalar wa¨e equation is sol¨ed, and thereby the characteristic equation for the guided modes under the weak guidance approximation is deri¨ed. To understand the basic modal properties in a simple manner, the cutoff equation is deri¨ed, and the modal cutoff properties of some modes are determined numerically.

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