Stochastic and coherence resonance in lasers: homoclinic chaos and polarization bistability |
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Authors: | F T Arecchi and R Meucci |
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Institution: | (1) CNR Instituto Nazionale di Ottica Applicata, Largo E. Fermi 6, 50125 Firenze, Italy;(2) Dept. of Physics, University of Firenze, Firenze, Italy |
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Abstract: | We report Stochastic Resonance and Coherence Resonance phenomena in
experiments using CO2 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. |
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Keywords: | PACS" target="_blank">PACS 05 40 Ca Noise 42 60 Mi Dynamical laser instabilities noisy laser behavior 42 65 Sf Dynamics of nonlinear optical systems optical instabilities optical chaos and complexity and optical spatio-temporal dynamics |
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