Stochastic resonance in a single-mode laser driven by the direct signal-modulated correlated colored noise

Using the linear approximation method, the output power spectrum of a gain-noise model is calculated in a single-mode laser driven by direct signal-modulated correlated colored pump and quantum noises. We detect that, not only resonance, but also suppression appear in the signal-to-noise ratio R versus the self-correlation time of pump noise tau(1) curve. However, when the frequency of input signal increases to a certain critical value Omega(0), both resonance and suppression disappear, i.e. the curve becomes monotonous. Moreover, the signal-to-noise ratio R versus attenuation coefficient gamma curve also exhibits resonance.