Figure 4

(a) The relation between the peak laser intensity ratio of the hot spots and the peak power of input pulses. (b) The statistic analysis of the jitter of the peak laser intensity ratio of the hot spots corresponding to the filaments 1 and 2. (c) The relation between the ratio of the start locations of filamentation and the peak laser intensity ratio of the hot spots. (d) The probabilities of situations A–C calculated theoretically by the simplified (2D+1)-dimensional model based on (a).