Modes of nonlinear couplers: building blocks for physical insight.
The physics of nonlinear couplers is dictated by its normal modes, modes that are found from linear (axially uniform) couplers. Elementary power-flow arguments establish whether the mode is stable or unstable. These facts provide the bifurcation diagram that fully characterizes nonlinear coupling.
Mitchell
D J
DJ
Snyder
A W
AW