Modeling of racetrack-resonator add-drop filters with arbitrary nonlinear directional couplers.
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.
Dept. Tecnología de los computadores y de las Comunicaciones, Universidad de Extremadura Escuela Politécnica, Av. Universidad, s/n. E-10003 Cáceres, Spain. rgomezal@unex.es
Rafael
R
Gómez-Alcalá
F Javier
FJ
Fraile-Peláez
Pedro
P
Chamorro-Posada
Francisco J
FJ
Díaz-Otero