Open AccessInfluence of quadratic phase existing in the initial condition on the dynamics of femtosecond laser pulse filamentation
Author(s) -
Ji Zhong-Gang,
Zhanxin Wang,
Jiansheng Liu,
Ruxin Li
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.7885
Subject(s) - filamentation , laser , pulse (music) , femtosecond , optics , quadratic equation , dispersion (optics) , phase (matter) , physics , self phase modulation , nonlinear optics , quantum mechanics , mathematics , geometry , detector
By employing a full-order dispersion model, we numerically investigat the filamentation of few-cycle laser pulse focused in argon. The focusing effect caused by lens is simulated by quadratic phases eik(ω)r2/2f and ik(0)r2/2f, separately. We find that it is inaccurate to simulate the focusing effect by employing eik(0)r2/2f, especially for the propagation of few-cycle. So quadratic phase eik(ω)r2/2f must be used in order to accurately simulate the effect induced by lens.