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Modal dispersion curves of an optical waveguide with an annular core cross section separated by two nonconcentric circles from two cladding regions

✍ Scribed by U. K. Singh; P. Khastgir; D. B. Singh; O. N. Singh

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

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✦ Synopsis

An optical fiber with an annular cross section bounded by two nonconcentric circles is analytically studied with a ¨iew to obtaining the modal characteristics. Using the characteristic equation deri¨ed from the matching of fields at the core᎐cladding boundaries expressed in terms of bipolar coordinates, dispersion cur¨es are obtained on the basis of numerical computations. The cur¨es corresponding to some modes are similar to the standard dispersion cur¨es for wa¨eguides. Howe¨er, the dispersion cur¨es of other modes show some unexpected beha¨ior; one mode e¨en shows no dispersion at all. These points are qualitati¨ely discussed.

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