Scientific Results

Stochastic and coherence resonance in lasers: homoclinic chaos and polarization bistability

Year: 2009

Authors: Arecchi F.T., Meucci R.

Autors Affiliation: CNR- INO,Largo E. Fermi 6, I-50125 Florence, Italy
Univ Florence, Dept Phys, I-50121 Florence, Italy

Abstract: We report Stochastic Resonance and Coherence Resonance phenomena in experiments using CO(2) lasers. First, we consider a polarized laser with feedback; for suitable feedback parameters, the laser intensity undergoes homoclinic chaos consisting in the return to a saddle focus, where noise controls the permanence time around the saddle. Second, we discuss a quasi-isotropic laser where noise induces switching between two intensity components with mutually orthogonal polarization.


Volume: 69 (1)      Pages from: 93  to: 100

More Information: The authors acknowledge Fondazione ECRF for financial support and Silvano Mascalchi for technical help.
KeyWords: Coherence resonance; Feedback parameters; Homoclinic chaos; Laser intensities; Noise control; Orthogonal polarizations; Polarization bistability; Polarized lasers; Saddle-focus; Stochastic resonances, Polarization; Random processes; Resonance; Signal analysis, Lasers
DOI: 10.1140/epjb/e2009-00099-1

Citations: 18
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