稳态V型和Λ型无粒子数反转激光增益的比较研究  

The comparison of steady-state gain of V-type and Λ-type atomic systems of lasing without inversion

作　　者：常增光[1] 刘建成[2] 闫珂柱[1] 

机构地区：[1]曲阜师范大学物理工程学院,曲阜273165 [2]德州学院物理系,德州253022

出　　处：《物理学报》2008年第8期4927-4932,共6页Acta Physica Sinica

摘　　要：在相应参量取值相同的情况下,利用数值模拟的方法对比研究了封闭的V型和Λ型原子系统稳态增益随相干光场失谐量的变化规律.研究发现,这两种系统的稳态探测激光增益随探测激光场失谐量的变化曲线具有相似的形状,但数值上存在差异.这一现象与两种系统的原子相干性与粒子数分布的特点直接相关.另外,还发现驱动激光失谐及由于自发辐射诱导相干导致的原子相干性的增强能显著影响探测激光增益.In this paper we study the dependence of steady-state gain of a closed V-type atomic system and a closed Λ-type atomic system of lasing without inversion on the detuning of the coherence lasers under the condition that the corresponding parameters of the two atomic systems are equal.By the way of numerical simulation and comparison,we find that the curves of probe-laser gain of the two atomic systems versus the detuning of probe-laser have similar shapes but their values are different,which are related to the characteristics of atomic coherence and population distribution of the two atomic systems directly.In addition,we find that the driving laser deturning and the additional atomic coherence caused by spontaneously generated coherence can exert a great influence upon the probe-laser gain.

关 键 词：无粒子数反转激光 失谐 原子相干性 粒子数分布 

分 类 号：TN241[电子电信—物理电子学]