低折射率液芯光纤喇曼光谱的实验研究

An experimental study on Raman spectrum of optical fiber filled up with low refractive index liquid

摘要: 低折射率液体CCl4溶于C6H5Br,C6H6,CS2等有机溶剂中,充入空心石英光纤,获得了102倍以上的喇曼光谱。实验结果表明,有机溶剂浓度既影响CCl4某些喇曼光谱线的强度(散射系统),也影响光纤数值孔径的大小。低折射率液体的光纤喇曼光谱存在着一个最佳溶液浓度。本文给出了实验结果,并进行简要讨论。

Abstract: Raman spectrum of CCl4 is enhanced by factor of 102～103 by means of hollow core quartz optical fiber fills up with the CCl4 solution.The experimental results show that the concentration of the solution effects not only the intensity(scattering factor) of some Raman spectrum lines,but also the numerical aperture of the liquidcore fiber.There is a optimal concentration at which the maximum Raman spectrum can be obtain.