Analysis of mode fields in optical waveguides

In this paper optical rib waveguides with buried guiding layer and optical conventional rib or ridge waveguide are analyzed using numerical method based on iterative scalar finite difference with open boundary condition. This assumed the exponential decay field at a sufficient distance. The coupled equations are formulated in terms of transverse electric field components E_x and E_y. Both the normalized refractive index and the field of the guided modes can be calculated very efficiently on a personal computer with modest computational time. The validity and accuracy of the method are assessed by comparing with other existing methods.