A nonlinear semivectorial beam propagation methodbased on the finite element method is presented. It applies tothree-dimensional optical waveguides and accounts for polarizationeffects. To show the usefulness of this approach numericalresults regarding both Ex (quasi-TE) and Ey (quasi-TM) wavesare presented for directional couplers with nonlinear cores. Thelimits of scalar formulations are highlighted especially whenworking near and above the coupler threshold power.
Nonlinear Finite-Element Semivectorial Propagation Method for Three-Dimensional Optical Waveguides / A., Cucinotta; S., Selleri; Vincetti, Luca. - In: IEEE PHOTONICS TECHNOLOGY LETTERS. - ISSN 1041-1135. - STAMPA. - 11:(1999), pp. 209-211. [10.1109/68.740706]