Answers are grounded in this paper and cite their sources.
Poynting's vector theorem describes power flow on twin-core couplers with arbitrary axial perturbations, both linear and nonlinear. This bypasses the coupled amplitude formulation and unifies nonlinear two-mode interactions in general.
No takes yet. Share an insight, caveat, or question.
Snyder et al. (1989) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: