光子晶体光纤的拉曼增强效应研究

摘要

拉曼散射是一种弱效应。从拉曼散射及其散射截面角度出发，通过将光子约束在一个极小的截面上并延长传输，即增加了拉曼散射截面，从而达到增强拉曼散射的效果。而光子晶体光纤特有的光子带隙效应与此方式类似，可将某一特定波长的光束缚在中心孔芯内传输。运用光子晶体光纤技术，设计了光子晶体光纤的拉曼效应增强系统。最后通过实验发现：光子晶体光纤用于拉曼效应增强是可行的，为后续微量物质、气体等检测提供了一种比较高效的分析方法。%Raman scattering is a weak effect .From the Raman scattering and the scattering cross section theory ,constraining the photons in a minimal section and extending the transmission ,which increases the Raman scattering cross section ,so as to en-hance Raman scattering effect .At the same time,the photonic crystal fiber unique photonic band gap is similar to this way ,which makes the transmission of a specific wavelength of light bounded in the central air hole .Using photonic crystal fiber technology de-signs the system of the photonic crystal fiber for Raman enhancement effect .Finally experiments show that photonic crystal fiber for Raman enhancement is feasible ,thus providing a more efficient method of subsequent analysis of trace substances ,gases and other testing .