AN EXACT SIMPLIFIED METHOD FOR THE NORMALIZATION OF RADIATION MODES IN PLANAR MULTILAYER STRUCTURES

We present an exact simplified method for the power normalization of the radiation modes in planar multilayer or graded index structures. The method depends mainly on the physical understanding of the radiation mode as a superposition of plane waves. The technique proposed simplifies greatly the required calculations and gives exactly the same analytical results obtained by the classical integration technique. Beside its physical point of view, this technique could be integrated in a more general computer program for the analysis of integrated optical discontinuities.