4 . the dipole squeezing of a a - type three - level atom interacting with a strong coherent field in a high - q kerr cavity is investigated . the effects of the kerr medium , the field - atom coupling coefficient and the detuning on the atomic dipole squeezing are discussed by numerical calculation 4 .研究了充满高qkerr介质腔内强相干光场与a型三能级原子相互作用中原子的偶极压缩效应，着重讨论了kerr介质、原子与光场间的藕合系数以及失谐量对原子偶极压缩的影响。
The state function for the interaction of a a - type three - level atom with two - mode squeezing vacuum field is derived in the paper . the influences of detuning 8 and initial squeezed light - field factor r on the cauchy - schwartz inequality , light squeezing and nonclassical properties are investigated 本文还导出了双模压缩真空场与型三能级原子非共振相互作用系统的态函数，研究了场模失谐量和场的初始压缩因子r对原子布居概率、光场压缩和非经典特性的影响。
When the beam waist wy of blue - detuned segb along the y direction is 10 mm , and its wx is decreased from 10 mm to 1mm , the absolute diffracted intensity from the segb surface will be 10 times of that from the sgb surface , which can be used to reflect an incident atomic beam with a higher normal velocity 因此，当椭圆高斯光束的w _ y = 10mm ，而w _ xw从10mn减小到1mm ，半束兰失谐椭圆高斯光束反射面的衍射光强将比同样参数条件下的sgb反射面的衍射光强提高了10倍。
The definition of dark hollow beam ( dhb ) and its generation are introduced in this thesis . at the same time , the principle , methods and experimental progress of atomic guiding in hollow optical fibers , blue - detuned evanescent wave and dark hollow beams are reviewed in some detail . finally , the basic definition of the angular momentums of all kinds of the hollow beams and their application are discussed 本文简单介绍了中空光束的定义及其产生方法，同时综述了采用中空光纤中红失谐高斯模式、中空光纤中蓝失谐消逝波和蓝失谐暗中空光束实现原子导引的原理、方法和实验及其最新进展，并对各类中空光束的角动量及其转换和应用进行了详细的介绍和讨论。
In the focal plane of z = 0 , the smaller the dss of the fhb , the higher the optical potential , and the greater the corresponding optimal detuning 8 , which are beneficial to atomic lens because it cannot only be profitable to obtain an atomic lens with a higher resolution , but also helpful to reduce the spontaneous emission and photon scattering effects of atoms in the fhb 在焦平面上，聚焦中空光束的dss越小，光学势越大，相应的最佳失谐量越大，这对原子透镜的性能越有利。因为这不仅容易得到高分辨率的原子透镜，而且还可以减少在聚焦中空光束中原子的自发辐射和光子散射效应。
We study the time evolution law of the atomic response in an open - type inversionless lasing system when the probe or driving field is off - resonance , and compare the law with that obtained when the probe and driving fields are resonant . we find that the detuning has considerable effects on the time evolution law : when the probe or driving fields is off - resonance , the dispersive responses for the probe and driving fields are no longer 0 and the two - photon coherence is no longer a pure real ; the variation of the probe detuning can make the time evolution law of the population distributions and the gain ( absorbtion ) of the driving field changing obviously ; with detuning increasing , the time evolution behavior of the gain ( absorbtion ) , dispersion of the probe field and the two - photon coherence will gradually diviate from the evolution law of the standard damped oscillator ; with the driving detuning increasing , the oscillating time of the dispersion of the driving field becomes longer , the amplitude and the stationary value increase 研究了探测场或驱动场失谐情况下开放的型无粒子数反转激光系统中原子响应的时间演化规律,并与探测场和驱动场都共振时的演化规律进行了比较.我们发现失谐对时间演化规律有显著的影响;当驱动场或探测场失谐时,原子对探测场和驱动场色散的响应不再为零,双光子相干不再是纯实量;探测场失谐的变化将使粒子布居和驱动场增益(吸收)的时间演化规律明显改变;随着失谐的增大,探测场增益(吸收) 、色散和双光子相干随时间的演化行为逐渐偏离标准阻尼振子的演化规律;驱动场色散驱动场失谐量的增加而振荡时间变长,振幅和稳定值变大
The results show that : ( 1 ) in the system of f - type three - level atom interacting with the single - mode squeezed vacuum radiation field , the squeezing property of the light is dependent on the squeezing parameter r of the squeezed vacuum field and the detuning x of the f - type three - level atoms ; ( 2 ) in the system of f - type three - level atom interacting with the radiation field in binomial states , the squeezing property of the light is dependent on the detuning x of the f - type three - level atom and the parameters m , of the optical field 数值计算结果表明： ( 1 )单模压缩真空场与三能级原子相互作用过程中，光场的压缩效应与单模压缩真空场的压缩因子和三能级原子的失谐量相关联。 ( 2 )二项式态光场与三能级原子相互作用过程中，光场的压缩效应与三能级原子的失谐量和二项式态光场参数m 、相关联。
The main works and results we have accomplished are as follows : 1 ) red - detuned locking of cooling / trapping laser to the cycling transition of cesium cooling has been accomplished by means of a double - passed acoustic - optical frequency shifting system and the technique of saturated absorption spectroscopy . the short - term residual frequency jitter is less than 350khz ; 2 ) automatic controlling system by computer programs has been established for laser cooling and trapping and cavity qed experiment . the laser and magnetic fields can be controlled by the acoustic - optical modulator and the electronic - controlled logic gate respectively 具体如下： 1 )采用了往返两次通过的声光频移系统结合饱和吸收光谱技术的实验方案，实现了冷却俘获激光频率相对于铯原子冷却循环跃迁的负失谐锁定，短期频率稳定度约在350khz以内，并可方便地调节其负失谐量而无须对后续光路再作调整； 2 )建立了一套基于计算机程序控制的、铯原子激光冷却与俘获实验所需的时序控制系统。
