The stationary properties of a single-mode laser with positive and negative correlations Between additive and multiplicative white-noise terms are investigated. By virtue of a simple Rule and decoupling ansatz, the intensity correlation function and correlation time for the laser Model are derived. We found that: (1) the fluctuation of light intensity with negative correlations Between the noise terms are reduced in comparison with those for positive correlations; (2) The coupling between additive and multiplicative noises enhances the rate of decay of intensity Correlation; (3) the effects of negative correlations between the noise terms are more remarkable Than those of positive correlations.
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