饱和效应对激光场强度相关时间和有效本征值的影响

Saturation Effects on Intensity Correlation Time and Effective Eigenvalue of a Laser Field

用全饱和激光模型对既含有加性又含有倍增噪声的激光场进行理论分析，求出了强度相关时间Ｔｃ的数值解和有效本征值λｅｆ的解析解。与实验测量相比较表明，全饱和激光模型与实验吻合得最好，而三次激光模型的偏差较大。当用全饱和激光模型的理论值同时拟合Ｔｃ和λｅｆ时，可以确定该激光系统的空腔衰减常数Ｋ。

A laser field that contains both additive and multiplicative noise are analysed based on a full saturation laser model. The numerical solution of intensity correlation time T c as well as the exact formulas of effective eigenvalue λ eff are calculated. Compared with the experimental measurements, excellent agreement is obtained for the full saturation laser theory, while relatively large errors occured in the third order laser theory and the measured data. By best fitting the experimental data of both T c and λ eff with the full saturation laser model, the cavity decay rate K of the laser system can be determined, therefore it provides a theoretical evidence for measuring K.