摘要
本文研究了非旋波近似下类克尔介质对“单模光场－受激三能级原子”系统的光子统计演化特性的影响．数值计算的结果表明：类克尔介质的作用直接影响着受激辐射场的平均光子数＜ｎ（ｔ）＞的Ｒａｂｉ振荡的幅度和频率；而虚光场的影响则表现为受激辐射场的量子噪音，它与激发场强的变化及场与介质的耦合程度密切相关．另外，本文还对＜ｎ（ｔ）＞进行了频谱分析，结果发现该非线性系统存在着一系列高次谐波；并且，各高次谐波成分和振幅的变化情况完全依赖于激发场强及与介质的耦合程度．
Int this paper,it is investigated the effect of the kerr like medium under unrotating wave approximation on the photon statistical evolution of ‘a single mode light field one excited three level atom’ system.The data of numerical calculation show that the function of the kerr like medium directly affects both Rabi vibration amplitude and Rabi vibration freqency of the <n(t)> of the excited radiation field,and the effect of the virtual field can exhibit the quantum noise of the excited radiation field,that is closely related to the change of the excited field intensity and the coupling extent of the field with the medium;The analysis of frequency spectrum of <n(t)> shows the existence of the high order harmonic of this nonlinear system,and both the change of the high order harmonic component and the vibration amplitude depend on the intensity of the excited field as well as the coupling extent of the field with the medium.
出处
《光子学报》
EI
CAS
CSCD
1998年第9期786-791,共6页
Acta Photonica Sinica
基金
江西省自然科学基金
关键词
非旋波近似
类克尔介质
光子统计演化
虚光场
Unrotating wave approximation
Kerr like medium
Virtual field
Photon statistical evolution
High order harmonic
Quantum noise
