Figure 7

Center laser intensity distributions at different pulse delays:
(a) 0, (b) 50, (c) 100 and (d) 350 fs (the laser fluence is fixed at 9.46 J/cm2 and the energy distribution ratio is 1:1).
Center laser intensity distributions at different pulse delays:
(a) 0, (b) 50, (c) 100 and (d) 350 fs (the laser fluence is fixed at 9.46 J/cm2 and the energy distribution ratio is 1:1).