物理学报2012，Vol.61Issue(7)：345-349,5.
空气中飞秒激光等离子体荧光辐射光谱研究
The fluorescence feature of plasma induced by femtosecond laser pulses in air
摘要
Abstract
Effects of focusing conditions on femtosecond laser induced plasma fluorescence in air are investigated by using different focal length lenses.Under the tightly focusing condition,the fluorescence spectra are composed mainly of continuous spectrum and line spectra from N and O atoms,which is due to the higher laser intensity and corresponding higher electron density than those in the case of weakly focused laser beam.In the latter case,only line spectra from air molecules are observed.Besides,the intensity of line spectrum as a function of propagation distance is measured,which reveals the evolution of the plasma filaments.关键词
飞秒激光/等离子体细丝/荧光光谱/光学击穿Key words
femtosecond laser/plasma filaments/fluorescence spectra/optical breakdown分类
数理科学引用本文复制引用
郭凯敏,高勋,郝作强,鲁毅,孙长凯,林景全..空气中飞秒激光等离子体荧光辐射光谱研究[J].物理学报,2012,61(7):345-349,5.基金项目
国家自然科学基金 （）
吉林省科技厅基金 （）
吉林省教育厅基金 （）
长春市科技局国际合作项目 （）
光电信息控制和安全技术重点实验室基金（批准号：9140c150302110c1501）资助的课题~~ （）
