Nitrogen fluorescence induced by the femtosecond intense laser pulses in air

被引：10

作者：

Li, He ^{[1
,2
]}

Li, Suyu ^{[1
,2
]}

Li, Shuchang ^{[1
,2
]}

Liu, Dunli ^{[1
,2
]}

Tian, Dan ^{[1
,2
]}

Chen, Anmin ^{[1
,2
]}

Wang, Ying ^{[1
,2
]}

Wang, Xiaowei ^{[1
,2
]}

Zhang, Yunfeng ^{[1
,2
]}

Jin, Mingxing ^{[1
,2
]}

机构：

[1] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Jilin Province, Peoples R China

[2] Jilin Univ, Jilin Prov Key Lab Appl Atom & Mol Spect, Changchun 130012, Jilin Province, Peoples R China

来源：

HIGH POWER LASER SCIENCE AND ENGINEERING | 2016年 / 4卷

基金：

中国国家自然科学基金;

关键词：

femtosecond laser; filament; fluorescence; LIGHT FILAMENTS; CONDENSATION; GENERATION; TRANSITION; REGIME; RANGE;

D O I：

10.1017/hpl.2016.8

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Our experiments show that external focusing and initial laser energy strongly influences filament generated by the femtosecond Ti-sapphire laser in air. The experimental measurements show the filament length can be extended both by increasing the laser energy and focal length of focusing lens. On the other hand, the plasma fluorescence emission can be enhanced by increasing the laser energy with fixed focal length or decreasing the focal length. In addition, the collapse distance measured experimentally are larger than the calculated ones owing to the group-velocity-dispersion effect. In addition, we find that the line widths of the spectral lines from N-2 is independent of filament positions, laser energies and external focusing.

引用

页数：7

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