Stochastic resonance of mixed periodic signal in single-mode laser driven by colored noises

Stochastic resonance (SR) is studied in a gain-noise model of a single-mode, which is driven by two coloured noises and correlated in the form of an e-exponential function. By adopting a linear approximation method, we calculate the laser intensity power spectrum and signal-to-noise ratio (SNR). It is found that the traditional SR appears with the change of intensities of the pump noise and quantum noise, moreover, the phenomenon of SR drivened by the coloured noeses is clearer than the white ones. This paper also shows that when the cross correlation time between two nosise increases to a certain number, the resonance disappears.