对利用激光器产生单模亚泊松光进行了研究。提出了一个普遍的主方程,它适用于任意稳定的原子注入方式,并在该方程中,考虑了有限腔寿命的作用。得出了输出光子数的Mandel因子,并指出在泵噪声抑制的基础上通过减少腔寿命,可以代替抑制自发辐射,使输出光子数的涨落进一步减小。 The use of lasers to produce single-mode sub-Poisson’s light was studied. A generalized main equation is proposed, which is suitable for any stable atomic injection method. In this equation, the function of finite cavity lifetime is considered. The Mandel factor of the output photon number is deduced. It is pointed out that on the basis of the pump noise suppression, by reducing the lifetime of the cavity, spontaneous emission can be suppressed instead and the fluctuation of output photon number can be further reduced.