Application of the variational-moment method to symmetric and nonsymmetric waveguides.
The variational-moment method is used to demonstrate the calculation of propagation constants for optical waveguides with arbitrary index profiles. For simplicity, and for comparison with exact numerical solutions, only a few one-dimensional structures are considered. Examples include symmetric and nonsymmetric waveguides. Good agreement with the exact numerical solutions is obtained in most cases, even for the nonsymmetric waveguides.