用激光增益获取弱增益拉曼模式的受激拉曼散射光谱  

Observation of stimulated Raman scattering of weak-gain Raman modes by means of lasing gain

作　　者：普小云[1] 杨正[1] 江楠[1] 陈永康[1] 戴宏[1] 

机构地区：[1]云南大学物理系,昆明650091

出　　处：《物理学报》2003年第10期2443-2448,共6页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :10 174 0 6 0 )资助的课题~~

摘　　要：当酒精的弱增益拉曼模式处于罗丹明 640染料分子的激光增益范围时 ,在由悬垂液滴构成的圆形谐振腔中 ,观察到乙醇分子C—H伸缩系列模中多个弱增益拉曼模式的受激拉曼散射 (SRS)光谱 .随着抽运光的增强 ,迅速增长的强增益拉曼模式的受激辐射抑制了其他弱增益模式的SRS ,并导致染料激光的完全淬灭 .通过分析圆形腔腔模的光子速率方程和激光染料分子的三能级粒子数速率方程 。The enhancement of stimulated Raman scattering (SRS) of weak-gain Raman modes is demonstrated by overlapping the Stokes wavelengths of the Raman modes with Dye lasing gain. Four SRS spectral lines related to C-H stretching modes of ethanol in a similar to 10(-5) mol/L Rhodamine 640-doped ethanol pendant drop can be observed, which are supported by the lasing gain of Rhodamine 640. The dye lasing is found to be partially and even totally suppressed by the intense SRS of ethanol as the pump intensity increasing from 1.2 x 10(8) W/cm(2) to 3.3 x 10(8) W/cm(2).

关 键 词：受激拉曼散射光谱 激光增益 弱增益拉曼模式 悬垂液滴 SRS 光子速率方程 抽运光 染料激光器 

分 类 号：O437.3[机械工程—光学工程] TN248.33[理学—光学]