研究了由单模压缩相干态光场与Ξ型三能级原子玻色爱因斯坦凝聚体(BEC)相互作用系统中耦合输出的双模原子激光的压缩特性,重点讨论了玻色爱因斯坦凝聚体原子间相互作用对原子激光压缩性质的影响,并讨论了原子激光压缩对光场初始压缩因子的依赖关系。结果表明：由光场诱导的双模原子激光呈现周期性的压缩,原子间的相互作用和光场初始压缩因子对原子的压缩性质具有重要影响。原子间的相互作用影响原子激光压缩的振荡频率而不会影响其压缩深度,而初始光场的压缩因子则对原子激光压缩深度产生调制作用,且初始光场的压缩因子越大,则原子激光压缩的时间越短。

The squeezing properties of twomode atom laser coupled output from the system of Ξtype threelevel atomic BoseEinstein condensate (BEC) interacting with single-mode squeezed coherent light field are studied, and the influence of interaction among atoms in BoseEinstein condensate on the squeezing properties of atom laser is discussed emphatically. The relation between squeezing of atom laser and initial squeezing factor of light field is also considered. The results show that the atom appears periodically squeezing, and the squeezing properties of atom laser depend closely on both interaction among atoms in BEC and initial squeezing factor of light. The interaction among atoms affects the oscillation frequency of squeezing of atom laser but doesn't squeezing depth. The initial squeezing factor of light modulates the squeezing depth of atom laser, and the greater the initial squeezing factor, the shorter the squeezing time of atom laser is.