title: Simple method for analyzing the birefringence of an elliptical-core fiber by an equivalent rectangular waveguide.
abstract: We present details of a simple method, incorporating first-order perturbation theory, to analyze the birefringence exhibited by elliptical-core fibers by using an equivalent rectangular-core waveguide. The results from this method are compared with those obtained from the finite-element and another approximate technique to demonstrate the accuracy of this simple method. The method may be extended to analyze waveguides of arbitrary geometry.
authors.forename: D F
authors.initials: DF
authors.lastname: Clark
authors.forename: I
authors.initials: I
authors.lastname: Dunlop