空心光子晶体光纤在拉曼光谱仪中的应用

针对拉曼散射是一种弱散射,同时由于空心光子晶体光纤(HC—PCF)能显著增强光与填充介质之间的相互作用,提出将HC—PCF应用到拉曼光谱仪中,利用平面波展开法对HC—PCF的光子带隙与场分布进行模拟分析,探讨了HC—PCF的参数对拉曼散射强度的影响。通过理论研究发现光子晶体光纤可根据实际应用的需要,通过改变光纤的周期结构或包层气孔之间的间距来改变光子带隙,从而可传输不同波段的光。结果表明了HC—PCF在拉曼光谱仪中应用的可行性,为拉曼光谱仪在分子结构检测与分析提供了新的技术方法,也为HC—PCF的应用和研究开拓了广阔前景。

Application of HC-PCF in Raman spectrometer

For Raman scattering is a weak scattering,and hollow-core photonic crystal fiber（HC-PCF） can be used to significantly enhance interaction between light and the filled in medium,propose to apply HC-PCF to Raman spectrometer,use planar wave expansion method to simulate and analyze HC-PCF photonic band gap and field distribution,discuss effect of HC-PCF parameters for Raman scattering intensity.Through theoretical study finds that photonic crystal fiber can transmit different wavelengths of light according to actual application needs to change the periodic structure of the fiber structure or the spacing between cladding holes to change photonic band gap,so as to transmit light of different waveband.The results show the feasibility of applying HC-PCF to Raman spectrometer,not only provides a new technical approach for Raman spectroscopy in detection and analysis of molecular structure,but also opens up broad prospects for application and research of photonic crystal fiber itself.