We analyze the instability conditions for the Ikeda model of a hybrid bistable system and study its behavior in a regime where the delay time of the feedback loop is comparable to or even smaller than the system's response time. The asymptotic behavior of the self-pulsing amplitude and of the critical slowing down in the vicinity of the instability threshold is consistent with that of other unstable systems described by a finite set of differential equations.

By measuring the phase shift of the response of a modulated laser, we improve upon a previous deonstration of the fit of the dynamics of a CO2 laser to a vibrational-rotation model and extract, rather than assume, the intraband relaxation rate.

The output intensity of a hybrid bistable system with a delay in the feedback loop is known to undergo regular and irregular self-pulishg. With the help of high-resolutin power spectra, we have analyzed numerically the transition of this system into chaos for several different valus of the delay thime, and found evidence for the exzistence of an infinite sequence of period-doubling bifurcations. followed by a reverse sequence in which the periodic components of the spectrum are supperimposed to a continuous noisy structure. We jave stidoed tje effect pf extermal Gaussian random noise and verified, as expected, the occurrence of bifurcation gaps. In the vicinity of the self-pulising threshold, more than three independent frequency components coexist without evidence for the appearance of a strange attractor.

Two methods of chaos control in a dynamic storage device which has been realized in an electro-optical bistable system pumped by a He-Ne laser are proposed. Experimental result agrees with the theoretical simulations and the Lyapunov exponent analysis. Up to 55 bits binary data storage have been successfully demonstrated.

This paper reports the phenomenon of frequency-unlocking in an electro-optical bistable system and proposes a method to control the frequency-unlocking state through controlling the chaotic output oscillation of the system. We successfully carry out a numerical simulation experiment, and then discuss the characteristics of the method and its physical nature. q1999 Elsevier Science B.V. All rights reserved.