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White-light femtosecond Lidar at 100 TW power level |
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| Authors: | M Petrarca S Henin N Berti M Matthews J Chagas J Kasparian J-P Wolf G Gatti G Di Pirro M-P Anania M Ferrario A Ghigo |
| Institution: | 1. GAP, Université de Genève, Chemin de Pinchat 22, 1211, Genève 4, Switzerland 2. INFN-LNF, Via E. Fermi, 40, 00044, Frascati, Rome, Italy 3. Centro de Previs?o do Tempo e Estudos Climáticos-CPTEC, Instituto Nacional de Pesquisas Espaciais-INPE, Cachoeira Paulista, SP, Brazil |
| Abstract: | 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. |
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