本文提出了一种测试新的喇曼增益介质——被扩散进石英光学纤维中氮——的受喇曼散射的方法。文中讨论了阈值条件,谱线宽度与泵浦功率间关系。观测了在低于单模光纤截止波长时的输出模式。实验中还观察到微弱的氮分子和石英分子间的耦合模式。

In the paper, a measuring method of the stimulated Raman scattering (SRS) of diffused N2 in solid silica optical fiber is proposed. It is a new type of Raman gain medium-gas in glass. The dependence of threshold and linewidth of SES on the power of pump light is discussed. The output mode is measured when the transmission wavelength in the optical fiber is lower than the cut-off wavelength of the single mode silica optical fiber. In addition a week coupling mode between N2 and SiO2 molecules is observed in the experiment.