小型光泵NH_3分子远红外激光器的模式竞争  

Mode Competition in Miniature Optically Pumped NH 3 Far Infrared Laser

作　　者：秦家银[1] 郑兴世[1] 罗锡璋 林贻 

机构地区：[1]中山大学电子系

出　　处：《光学学报》1996年第11期1570-1575,共6页Acta Optica Sinica

基　　金：国家自然科学基金;广东省自然科学基金

摘　　要：通过求解四能级系统的半经典密度矩阵方程，用迭代法计算了ＣＯ２－１０Ｒ（６）泵浦小型超辐射光泵ＮＨ３分子远红外激光器（ｍｉｎｉ－ＮＨ３－ＯＰＦＩＲＬ）的Ｐ支和Ｑ支跃迁输出光强的增量比。计算表明在超辐射小型ＮＨ３光泵远红外激光器中，Ｖ２ａ→ｓＰ（５，４）和ａ→ｓＱ（５，４）模式竞争结果，Ｑ支跃迁占优势，使Ｐ支被抑制。The semiclassical density matrix equation of four energy levels was solved. Then by means of iteration method, the output power increment ratio of V 2∶a→s P(5, 4) to a→s Q(5, 4) transition in miniature optically pumped NH 3 molecules far infrared superradiant laser (mini NH 3 OPFIRL), which was pumped by CO 2 10R(6) line, was calculated. The calculation showed that the mode competition between the V 2∶a→s P(5, 4) and V 2∶a→s Q(5, 4) in superradiant mini NH 3 OPFIRL led to the elimination of V 2∶a→s P(5, 4) transition branch. The theoretical calculation was consistent with the experimental result.

关 键 词：远红外 小型光泵 激光器 拉曼跃迁 模式竞争 

分 类 号：TN248[电子电信—物理电子学]