Coupled-Mode Theory derivation of the formal equivalence between a three-mode waveguide and a set of three mutually coupled single-mode waveguides

Yann Boucher (1, 2)

1 FOTON - Fonctions Optiques pour les Technologies de l'informatiON
2 ENIB - École Nationale d'Ingénieurs de Brest

The formal identification between a two-mode waveguide and a system of two mutually coupled single-mode waveguides stems from the symmetries of the evolution operator. When the gap tends to zero, the super-modes of the coupled system merge continuously into the modes of the multimode waveguide. For modelling purposes, it is very tempting to extend the analogy to three-mode waveguides (and beyond). But not without some precautions…

Domaines: Physique [physics]

Yann Boucher. Coupled-Mode Theory derivation of the formal equivalence between a three-mode waveguide and a set of three mutually coupled single-mode waveguides. Nanophotonics and Micro/Nano Optics International Conference 2016 (NANOP 2016), Dec 2016, Paris, France. pp.00009, ⟨10.1051/epjconf/201713900009⟩. ⟨hal-01496401⟩