n型主动拉曼增益原子介质中的光学双稳态  

Optical bistability via active Raman gain in an n-type atomic medium

作　　者：杨金金[1] 李慧军[1] 文文[2] 黄国翔[3] 

机构地区：[1]浙江师范大学物理系,非线性物理研究所,金华321004 [2]河海大学常州校区数理部,常州213022 [3]华东师范大学物理系,精密光谱科学与技术国家重点实验室,上海200061

出　　处：《物理学报》2012年第22期248-254,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11174080;11175158;11105039);浙江省自然科学基金(批准号:Y6100355);浙江师范大学博士基金科研项目资助的课题~~

摘　　要：研究了主动拉曼增益原子介质在单向环形腔中的光学双稳态.该系统是一个相干共振的n型四能级原子系统,可在室温下实现,有能级失谐量、原子数密度、抽运场、控制场等较多的可调参数,且有无增益的透明窗口.完全通过解析方法定量给出实现光学双稳态的条件,以及可调参数的取值范围,并进一步给出实现光学多稳态的条件,为实验上实现光学双稳态与多稳态提供了理论依据.We study the optical bistability （OB） in an active Raman gain atomic medium by means of a unidirectional ring cavity. The system considered is a resonant n-type four-level atomic ensemble, which can be realized at room temperature and not only have a lot of tunable parameters, such as detuning, atomic concentration, pump and control field, but also possess gain-free （or little gain） transparent windows. We discuss the conditions and the range of these parameters for realizing OB, and also the condition for realizing optical multistability. Our results will provide the theoretical basis for experimental realization.

关 键 词：主动拉曼增益 光学双稳态 n型原子介质 

分 类 号：O437[机械工程—光学工程]