Analytical approximations for fundamental‐mode field and dispersion equation of planar waveguides through the Stevenson–Padé approach

Abstract

A novel method for the systematic derivation of analytical approximations of the fundamental-mode dispersion equation and field distribution of graded-index planar waveguides with uniform cladding is presented. The method is based on a Stevenson–Padé approach, recently introduced by the authors for the numerical analysis of graded-index optical fibers. A number of examples are presented in order to illustrate the power and accuracy of the method. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 27: 158–162, 2000.