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在液芯光纤内产生共振拉曼效应,可以提高拉曼光谱强度10~9倍。样品(被测物)的浓度、模吸收系数、光散射系数和模耦合系数决定光纤最佳长度。该技术为分子光谱研究提供了一种新实验方法,在痕量分析、液体中少量分子相互作用研究等方面有很大的应用潜力。低浓度的β—胡萝卜素(β-carotene)在CS_2中和I_2在CS_2中的拉曼光谱被得到,其浓度分别是1×10~(-13)mol/L和1×10~(-14)mol/L。
Resonance Raman effect in the liquid core optical fiber, Raman spectrum can improve the intensity of 10 to 9 times. The sample (analyte) concentration, mode absorption coefficient, light scattering coefficient and mode coupling coefficient determine the optimal length of the optical fiber. This technique provides a new experimental method for the study of molecular spectroscopy and has great potential for application in trace analysis and molecular interactions in liquids. The Raman spectra of low concentration of β-carotene in CS_2 and I_2 in CS_2 were obtained, and their concentrations were 1 × 10 ~ (-13) mol / L and 1 × 10 ~ (-14 ) mol / L.