Title :
Accuracy of method of moments and weighted index method
Author :
Roberts, David A. ; Stern, M.S.
Author_Institution :
University of Sheffield, Department of Electronic & Electrical Engineering, Sheffield, UK
Abstract :
The weighted index (WI) method has been used to compute the propagation constants of buried and channel waveguide structures. The results are compared with the commonly used effective index method, the method of moments and an accurate finite difference technique. The WI method is shown to be the most accurate of the approximate methods and is especially useful close to cutoff.
Keywords :
integrated optics; optical waveguide theory; approximate methods; buried waveguides; channel waveguide structures; close to cutoff; effective index method; finite difference technique; method of moments; optical waveguides; propagation constants; waveguide theory; weighted index method;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870556
