Stochastic resonance driven by time-modulated correlated coloured noise sources in a single-mode laser
Chen De-Yi(陈德彝)a) and Zhang Li(张莉)b)†
aDepartment of Physics, College of Science, China Three Gorges University, Yichang 443002, China; bCollege of Electrics and Information Engineering, South-Central University for Nationalities, Wuhan 430074, China
Abstract This paper investigates the phenomenon of stochastic resonance in a single-mode laser driven by time-modulated correlated coloured noise sources. The power spectrum and signal-to-noise ratio R of the laser intensity are calculated by the linear approximation. The effects caused by noise self-correlation time $\tau_1$, $\tau_2$ and cross-correlated time $\tau_3$ for stochastic resonance are analysed in two ways: $\tau_1$, $\tau_2$ and $\tau_3$ are taken to be the independent variables and the parameters respectively. The effects of the gain coefficient $\varGamma$ and loss coefficient K on the stochastic resonance are also discussed. It is found that besides the presence of the standard form and the broad sense of stochastic resonance, the number of extrema in the curve of R versus K is reduced with the increase of the gain coefficient $\varGamma$.
Received: 17 September 2008
Revised: 16 November 2008
Accepted manuscript online:
(Resonators, cavities, amplifiers, arrays, and rings)
Cite this article:
Chen De-Yi(陈德彝) and Zhang Li(张莉) Stochastic resonance driven by time-modulated correlated coloured noise sources in a single-mode laser 2009 Chin. Phys. B 18 1755
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