Coarse grained variables and deterministic chaos in an excitable system.
Temporal coarse graining was applied to the dynamical variables of a semiconductor laser with optical feedback. The chaotic low frequency fluctuations obtained in numerical and experimental data are shown to have properties of a self-excitable deterministic system. External exciting noise is replaced by the ultrafast chaotic oscillations of the system. A low dimensional coarse-grained phase space is defined and time constants are introduced and measured for the exponential drop and recovery of the randomly excited equally shaped spikes.
Martinez Avila
Jhon F
JF
Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, PE, Brazil.
de S Cavalcante
Hugo L D
HL
Rios Leite
J R
JR