为了研究激光点火过程中的化学反应历程，采用光谱分析方法分析研究了1064 nm脉冲激光作用下石墨/硝酸钾烟火药剂的激光烧蚀发射光谱。测试分析表明激光作用过程中烧蚀的光谱具有线状光谱的特性，波长主要分布在300~600 nm之间。光谱谱线揭示了烧蚀解离的谱线组成主要有N、O、C、K的原子光谱和离子光谱，在能量密度为46.7 J/cm2的激光作用下，NⅡ385.61 nm谱线最强，OⅡ441.70 nm谱线最弱。烧蚀产物在气相中发生燃烧反应。

Laser ablation emission spectra of graphite/potassium nitrate under pulse laser irradiation with wavelength of 1064 nm are analyzed to investigate the chemical reaction processes during laser ignition. Testing results indicate that ablation spectra possess the characteristics of line spectra, and wavelengths of spectra range mainly from 300 to 600 nm. Ablation spectra mainly consist of atomic spectrum and ionic spectrum of N, O, C and K. When the laser energy density is 46.7 J/cm2, NⅡ385.61 nm spectrum is the strongest while OⅡ441.70 nm spectrum is the weakest. The ablation products combusted in gas phase.