Gas-induced solitons |
| |
| Authors: | Bergé L Couairon A |
| |
| Institution: | Commissariat à l'Energie Atomique, Département de Physique Théorique et Appliquée, B.P. 12, 91680 Bruyères-le-Chatel, France. |
| |
| Abstract: | The self-guiding of femtosecond laser pulses in air is investigated. For powers close to the threshold for self-focusing, we show that the balance between the nonlinear focusing of the beam and its defocusing by multiphoton sources produces a new kind of solitonlike structure. Over considerably long distances, the radial profile of the pulse relaxes to a steady-state shape, whereas its temporal profile shrinks along propagation. The influence of the normal group-velocity dispersion is finally discussed. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
