We point out inconsistencies in previous analyses of multiple-channel nonlinear directional couplers based on Kerr-type media and present a modified set of coupled-mode equations for a three-channel nonlinear coupler that indicate a mode of power switching between channels with increased input power that is both qualitatively and quantitatively different from that predicted previously.
© 1992 Optical Society of America
Chula Mapalagama and R. T. Deck, "Modified theory of three-channel Kerr-type nonlinear directional coupler," J. Opt. Soc. Am. B 9, 2258-2264 (1992)