title: Experimental deterministic coherence resonance.
abstract: We demonstrate coherence resonance in a dynamical system without external noise. The experimental evidence is reported in the low frequency fluctuations of a chaotic diode laser with optical feedback. The phenomenon is also verified numerically using the Lang-Kobayashi equations for a single solitary mode laser, without noise terms. Fast deterministic dynamics plays the role of an effective exciting noise, narrowing the resonance in the autonomous slow power drop cycles of the laser. This new result is the natural extension of deterministic stochastic resonance and noise induced coherence resonance predicted and observed in recent years.
authors.affiliation: Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, PE, Brazil.
authors.forename: Jhon F
authors.initials: JF
authors.lastname: Martinez Avila
authors.forename: Hugo L D
authors.initials: HL
authors.lastname: de S Cavalcante
authors.forename: J R Rios
authors.initials: JR
authors.lastname: Leite