Boosted propagation of femtosecond filaments in air by double-pulse combination.
Two femtosecond pulses in convergent geometry are combined with an appropriate time delay, in order to double the length of the plasma channel created by multiphoton ionization of air. Suitable parameters are estimated analytically and tested by direct numerical simulations.
Bergé
Luc
L
Département de Physique Théorique et Appliquée, Commissariat à l'Energie Atomique, CEA/DAM-Ile de France, B.P. 12,91680 Bruyères-le-Châtel, France.