【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 ,解释了观察到的实验现象更多还原

【Abstract】 The enhancement of stimulated Raman scattering (SRS) of weak-gain Raman modes i s 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 ethan ol in a～10 -5mol/L Rhodamine 640-doped ethanol pendant drop can be obser ved, 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 2×10 8W/cm 2 to 3 3×10 8W/cm 2 .更多还原