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.