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Spectroscopic analysis of high electric field enhanced ionization in laser filaments in air for corona guiding
  • ISSN号：2095-4719
  • 期刊名称：《高功率激光科学与工程：英文版》
  • 时间：0
  • 分类：TN24[电子电信—物理电子学]
  • 作者机构：State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences, Centre d’Optique,Photonique et Laser (COPL) and Dpartement de physique,de gnie physique et d’optique,Universit Laval
  • 相关基金：supported in part by National Natural Science Foundation of China (Nos 61221064,11127901 and 11404354);the National 973 Project of China (No.2011CB808103);the Chinese Academy of Sciences and the State Key Laboratory of High Field Laser Physics;the 100 Talents Program of Chinese Academy of Sciences;the Shanghai Pujiang Program
作者： Yingxia Wei, Yaoxiang Liu, Tie-Jun Wang, Na Chen, Jingjing Ju, Yonghong Liu, Haiyi Sun, Cheng Wang, Jiansheng Liu, Haihe Lu, See Leang Chin, Ruxin Li
关键词： FEMTOSECOND, LASER, FILAMENTATION, FILAMENT, induced, fluorescence, spectroscopy, LASER, guided, discharges
中文摘要：

We report on a systematic experimental study on the fluorescence spectra produced from a femtosecond laser filament in air under a high electric field. The electric field alone was strong enough to create corona discharge(CD). Fluorescence spectra from neutral and ionic air molecules were measured and compared with pure high-voltage CD and pure laser filamentation(FIL). Among them, high electric field assisted laser FIL produced nitrogen fluorescence more efficiently than either pure CD or pure FIL processes. The nonlinear enhancement of fluorescence from the interaction of the laser filament and corona discharging electric field resulted in a more efficient ionization along the laser filament zone, which was confirmed by the spectroscopic measurement of both ionization-induced fluorescence and plasma-scattered 800 nm laser pulses. This is believed to be the key precursor process for filament-guided discharge.

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期刊信息
  • 《高功率激光科学与工程：英文版》
  • 主管单位:中国科学院
  • 主办单位:中国科学院上海光学精密机械研究所 中国光学学会
  • 主编：林尊琪
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  • 国际标准刊号：ISSN：2095-4719
  • 国内统一刊号：ISSN：31-2078/O4
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  • 被引量:7