In this paper propagation constant in the photonic crystal fibers have been calculated by solving Helmholtz equation. calculations have been done base on the boundary element method (BEM). First, the Helmholtz equation has been converted in to integral equations using the GreensTheorem. Then, these integral equations have been solved using boundary element method. Calculations are done for photonic crystal fibers and an optical fiber with circular cross section a very good accommodation has been observed between numerical and analytical results. Also, the variation of the propagation constant with respect to frequency (dispersion) has been investigated.

Keywords: Boundary element, Green\'s theorem, frequency dispersion, propagation constant

Full-Text [PDF 268 kb]   (1025 Downloads)