TE-wave Propagation Modeling in Nonuniform Waveguide by Vector Finite Element Method

The paper considers applying vector finite element method to modeling of TE-waves propagation in optical fiber. Spurious modes are found in the obtained numerical solution. Analysis of analytical solution shows that spurious modes have nonzero $E_r$ component of electric field and don't conform to continuity condition of $\mathbf{H}$ field at the core–cladding interface.