Abstract

It is well known that near-resonant (i.e., close to subharmonic frequency) periodic perturbations depending on the type of bifurcation (supercritical or subcritical) can. produce stabilizing, or destabilizing shifts of the bifurcation points in dynamical systems,^1-4 including CO₂ lasers.⁴ Recently, it was shown theoretically that small deviations of the perturbation frequency from the subharonic one in the nonfedback control of chaos in CO₂ lasers results in a regular alternation between periodic and chaotic behaviors.

© 1996 Optical Society of America