Fig. 1. Schematic diagram of the experimental setup.

Fig. 2. (a) Laser filaments at different pulse durations (153, 62, 25, 47, and 101 fs) and chirps (−5.9, −2.2, 0, +1.5, and 3.8) in the cloud chamber without the probe beam and (b) fluoresence intensity distribution of the laser filaments.

Fig. 3. (a) Video capture for side Mie scattering without laser irradiation, (b) video capture for side Mie scattering induced by the laser-induced water condensation, and (c)–(g) laser induced snow formation on the bottom base plate after irradiating 1 kHz laser pulses for 1 h.

Fig. 4. Dependence of the amount of laser induced snow pile on the chirp parameters.