This paper reports the phenomenon of frequency-unlocking in an electro-opti
cal bistable system and proposes a method to control the frequency-unlockin
g state through controlling the chaotic output oscillation of the system. W
e successfully carry out a numerical simulation experiment, and then discus
s the characteristics of the method and its physical nature. (C) 1999 Elsev
ier Science B.V. All rights reserved.