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Open Access item Experimental Evidence of Coherence Resonance in an Optical System

Authors:Giacomelli, Giovanni
Giudici, Massimo
Balle, Salvador
Tredicce, Jorge R.
Issue Date:2000
Publisher:American Physical Society
Citation:Physical Review Letters 84: 3298- 3301 (2000)
Abstract:Experimental evidence of coherence resonance in an optical system is reported. We show that the regularity of the excitable pulses in the intensity of a laser diode with optical feedback increases when adding noise, up to an optimal value of the noise strength. Both phase and amplitude fluctuations of the pulses play a relevant role in the dynamics of the system. We introduce the joint entropy of the two variables to generalize the indicator of coherence, and we put in evidence the mechanism of destruction of the excitable orbit after the resonance.
Identifiers:doi: 10.1103/PhysRevLett.84.3298
issn: 0031-9007
Appears in Collections:(IMEDEA) Artículos

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