Investigation of the supercell based orthonormal basis function method for different kinds of fibers

摘要

The supercell based orthonormal basis function method is proposed in this paper, in which the eigenequation about the propagation constant and the modal field is derived from the full vectorial coupled wave equations. It is efficient and accurate because all of the overlap integrals and the decomposition coefficients can be evaluated analytically. This method is efficient to investigate almost all the mode characteristics, such as the vector, degeneracy, coupling, absorption or gain properties, for so many kinds of fibers as ring fibers, Bragg fibers, multi-core fibers, elliptical fibers and photonic crystal fibers (PCF).