Rodriguez Miguel, Bourayou Riad, Méjean Guillaume, Kasparian Jérôme, Yu Jin, Salmon Estelle, Scholz Alexander, Stecklum Bringfried, Eislöffel Jochen, Laux Uwe, Hatzes Artie P, Sauerbrey Roland, Wöste Ludger, Wolf Jean-Pierre
Teramobile, Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Mar;69(3 Pt 2):036607. doi: 10.1103/PhysRevE.69.036607. Epub 2004 Mar 30.
Ultrashort, high-power laser pulses propagating vertically in the atmosphere have been observed over more than 20 km using an imaging 2-m astronomical telescope. This direct observation in several wavelength bands shows indications for filament formation at distances as far as 2 km in the atmosphere. Moreover, the beam divergence at 5 km altitude is smaller than expected, bearing evidence for whole-beam parallelization about the nonlinear focus. We discuss implications for white-light Lidar applications.
使用一台2米成像天文望远镜，已在超过20千米的距离上观测到垂直在大气中传播的超短高功率激光脉冲。在几个波段的这种直接观测显示出在大气中距离达2千米处有丝状结构形成的迹象。此外，在5千米高度处的光束发散比预期的小，这证明了围绕非线性焦点的整束平行化。我们讨论了其对白光激光雷达应用的影响。
