Abstract We study the effects of correlations between quantum and pump noises on fluctuations of the laser intensity in a saturation laser model. An approximative Fokker--Planck equation and analytic expressions of the steady-state probability distribution function (SPD) of the laser system are derived. Based on the SPD, the normalized mean, the normalized variance, and the normalized skewness of the steady-state laser intensity are calculated numerically. The results indicate that (i) the correlation strength $\lambda$ of correlated noises always enhances the fluctuation of laser intensity; (ii) the correlation time $\tau$ of correlated noises strengthens the fluctuation of laser intensity for the below-threshold case but $\tau$ weakens it for the above-threshold case.
Received: 17 February 2006
Revised: 07 July 2006
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of
China (Grant No 10363001) and the Natural Science Foundation of Yunnan province (Grant No 2005A0002M).
Cite this article:
Chen Shi-Bo(陈世波) and Mei Dong-Cheng(梅冬成) Statistical fluctuations in a saturation laser model with correlated noises 2006 Chinese Physics 15 2861
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