In this Letter we employ the general coupled-mode equations of the nonlinear directional coupler and demonstrate that the switching characteristics of prototypical nonlinear racetrack-resonator structures may differ considerably from those obtained when the standard, generally incorrect, coupled-mode equations are used.
© 2012 Optical Society of America
Original Manuscript: January 3, 2012
Revised Manuscript: April 13, 2012
Manuscript Accepted: April 30, 2012
Published: May 30, 2012
Rafael Gómez-Alcalá, F. Javier Fraile-Peláez, Pedro Chamorro-Posada, and Francisco J. Díaz-Otero, "Modeling of racetrack-resonator add-drop filters with arbitrary nonlinear directional couplers," Opt. Lett. 37, 2097-2099 (2012)