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.
© 1989 Optical Society of America
Original Manuscript: January 26, 1989
Manuscript Accepted: July 11, 1989
Published: October 15, 1989
D. John Mitchell and Allan W. Snyder, "Modes of nonlinear couplers: building blocks for physical insight," Opt. Lett. 14, 1143-1145 (1989)