双光子跃迁上能级的选择  

SELECTION OF UPPER LEVEL FOR TWO-PHOTON TRANSITION

作　　者：方允[1] 孙寅官[2] 何琛娟[1] 

机构地区：[1]北京师范大学物理学系 [2]北京师范大学分析测试中心,北京100875

出　　处：《北京师范大学学报（自然科学版）》1997年第3期349-352,共4页Journal of Beijing Normal University(Natural Science)

摘　　要：以微扰论证明，并以Na原子4D—4P—3S路径参量四波混频辐射的增益和实验结果证实，双光子跃迁中间虚能级越靠近实能级，跃迁几率越大，非线性光学效应越强．It is demonstrated that the probability of two-photon transition increases and the nonlinear optical effects is enhanced when the intermediate virtual state closes to the true one on the basis of perturbation theory and according to the gain formula and the experimental conclusions of sodium parametric four wave mixing along the 4D-4P-3S pathway.

关 键 词：跃迁几率 双光子跃迁 非线性光学效应 能级 

分 类 号：O437[机械工程—光学工程]