EFFICIENT PROPAGATION ALGORITHM FOR 3D OPTICAL WAVE-GUIDES

The well established free space radiation mode (FSRM) method is extend ed to the analysis of dielectric waveguide discontinuities and propaga tion in fully three dimensional structures. Unlike beam propagation me thods (BPM) the method intrinsically incorporates continuous reflectio ns and is inherently wide angled in nature. Results are given fora. re presentative selection of practical structures, such as single and dou ble step discontinuities and tapers, for both TE and TM polarisations. The method is computationally efficient with minimal memory requireme nts.