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.
© 1989 Optical Society of America
Original Manuscript: June 5, 1989
Manuscript Accepted: August 7, 1989
Published: October 15, 1989
D. F. Clark and I. Dunlop, "Simple method for analyzing the birefringence of an elliptical-core fiber by an equivalent rectangular waveguide," Opt. Lett. 14, 1149-1151 (1989)