Enhancement of multi-filament generation and filament-induced fluorescence by turbulence

被引：5
|
作者：
Liu, Jinpei [1 ,2 ]
Zhang, Zhi [1 ,3 ]
Shang, Binpeng [1 ,2 ]
Chu, Chunyue [1 ,2 ]
Sun, Lu [1 ,2 ]
Zhang, Nan [1 ,2 ]
Lin, Lie [1 ,3 ]
Liu, Weiwei [1 ,2 ]
机构：
[1] Nankai Univ, Inst Modern Opt, Tianjin 300350, Peoples R China
[2] Tianjin Key Lab Microscale Opt Informat Sci & Tec, Tianjin 300350, Peoples R China
[3] Tianjin Key Lab Optoelect Sensor & Sensing Networ, Tianjin 300350, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2022年 / 517卷
基金：
国家重点研发计划;
关键词：
Turbulence; Backward fluorescence; Self-focusing effect; Multiple filaments; FEMTOSECOND LASER-PULSES; CRITICAL POWER; LIGHT; LONG; PROPAGATION; SIMULATIONS; INTENSITY; ABLATION; DISTANCE;
D O I：
10.1016/j.optcom.2022.128290
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Exploring the influence of atmospheric turbulence on remote sensing based on filament-induced fluorescence is still challenging. In this study, we applied artificial turbulence during remote filamentation and recorded the enhanced backward fluorescence of nitrogen. At the strongest turbulence, the nitrogen fluorescence signal was higher than that obtained when no turbulence was applied. The air turbulence introduces random noise in the laser profile, which is subsequently amplified by self-focusing effect and causes multiple filamentation. Moreover, by lowering the threshold for multiple filaments generation, turbulence led to an increase in the number of filaments, thereby enhancing fluorescence.
引用
收藏
页数：7
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