液芯光纤中溶液吸收和荧光的性质对CS2受激拉曼散射阈值的影响

利用液芯光纤技术研究了不同浓度的β-Carotene的CS₂溶液的吸收与荧光的特性对CS₂的一、二阶Stokes谱线阈值的影响.实验发现随溶液浓度(10^-8—10^-6 mol/L)增加，CS₂的一阶Stokes谱线的激发阈值相对变高；并且与纯CS₂芯液的受激拉曼散射相比较，在低抽运能量激发下，就观察到CS₂的二阶Stokes谱线.这主要是由于在CS₂的受激拉曼谱线产生的过程中，β-Carotene的CS₂溶液的吸收和荧光共同影响了CS₂的一、二阶Stokes谱线的阈值.我们进行了理论上的拟合与分析，其结果与实验符合很好. 关键词： 2受激拉曼散射阈值')" href="#">CS₂受激拉曼散射阈值 液芯光纤 吸收与荧光

The influence of absorption and fluorescence from the solution on the stimulated Raman threshold of CS2 in liquid-core optical fiber

It is shown from experiments that the stimulated Raman thresholds of the first and the second Stokes lines of CS₂ are influenced by the absorption and fluorescence from the solution of β-Carotene in CS₂ in liquid core optical fiber. The threshold of the first Stokes line of CS₂ becomes higher when the concentration of the solution increases. And the second Stokes line of CS₂ can be observed at a lower pump energy in the solution of β-Carotene in CS₂ compared with that of the solution of pure CS₂. Then the theoretic explanations are given and the theoretic results agree well with the experimental results.