White-light femtosecond Lidar at 100 TW power level
White-light femtosecond Lidar at 100 TW power level
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DOI：
10.1007/s00340-013-5741-6
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发表时间：
2013-12
期刊：
影响因子：
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通讯作者：
M. Petrarca;S. Henin;N. Berti;M. Matthews;J. Chagas;J. Chagas;J. Kasparian;J. Wolf;G. Gatti;G. Pirro;M. Anania;M. Ferrario;A. Ghigo
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文献类型：
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作者：
M. Petrarca;S. Henin;N. Berti;M. Matthews;J. Chagas;J. Chagas;J. Kasparian;J. Wolf;G. Gatti;G. Pirro;M. Anania;M. Ferrario;A. Ghigo
通过光探测和测距测量，研究了亚拍瓦激光系统在大气中的白光超连续谱发射特性。在大气中产生多达1 J的超连续谱，对应于30%的转换效率。这种情况发生在海拔100米以下。高的初始光束强度导致自导引丝数目的饱和。因此，围绕灯丝的“光子浴”强烈地有助于白光的产生。基于实验参数的数值模拟很好地再现了这些发现。
We characterized the white-light supercontinuum emission by a sub-petawatt laser system in the atmosphere via light detection and ranging measurements. As much as 1 J of supercontinuum is generated in the atmosphere, corresponding to a conversion efficiency of 30 %. This generation occurs at altitudes below 100 m. The high initial beam intensity results in the saturation of the number of self-guided filaments. Therefore, the “photon bath” surrounding the filaments strongly contributes to the white-light generation. These finding is well reproduced by numerical simulations based on the experimental parameters.