Abstract

Two different methods are successively applied to obtain approximate formulas describing dispersion properties of the asymmetric three-layered slab and W-type slab waveguides. One method begins with a differential equation for the transverse phase constant; another is a direct approach to the characteristic equation by using a far-from-cutoff approximation. Numerous figures are presented to reveal the accuracy of the approximate formulas obtained.

© 1979 Optical Society of America

An approximate formula for describing dispersion properties of optical dielectric slab and fiber waveguides

Mitsunobu Miyagi and Shigeo Nishida
J. Opt. Soc. Am. 69(2) 291-293 (1979)

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