Chaotic laser as an amplifier of periodic signals via deterministic stochastic resonance

Summary form only given. It has been theoretically shown on the basis of a simple map that chaotic systems operating in the region of intermittency resulting from the band-merging crisis can enhance the response of systems to weak periodic signal via so-called deterministic stochastic resonance (SR). In this case, chaos inherent in the system is used as an internal source of noise instead of an external one as in conventional SR. We show experimentally and numerically that a chaotic loss-modulated CO/sub 2/ laser operating in the region of a crisis-induced intermittency can serve as an amplifier of near resonant signals (NRS), i.e. close to the first subharmonic frequency, via the phenomenon of deterministic SR.