Key points are not available for this paper at this time.
The evolution of the amplitudes of two general, codirectional coupled waves is represented as a rotation of a generalized Poincaré sphere in analogy to polarized light. The method permits simple, pictorial representation of coupling effects in directional couplers and "monomode" optical fibers.
R. Ulrich (Thu,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: