Using 1 kHz, 9 mJ femtosecond laser pulses, we demonstrate laser-filamentation-induced spectacular snow formation in a cloud chamber. An intense updraft of warm moist air is generated owing to the continuous heating by the high-repetition filamentation. As it encounters the cold air above, water condensation and large-sized particles spread unevenly across the whole cloud chamber via convection and cyclone like action on a macroscopic scale. This indicates that high-repetition filamentation plays a significant role in macroscopic laser-induced water condensation and snow formation.
© 2012 Optical Society of America
Original Manuscript: November 10, 2011
Revised Manuscript: January 16, 2012
Manuscript Accepted: January 31, 2012
Published: March 26, 2012
Jingjing Ju, Jiansheng Liu, Cheng Wang, Haiyi Sun, Wentao Wang, Xiaochun Ge, Chuang Li, See Leang Chin, Ruxin Li, and Zhizhan Xu, "Laser-filamentation-induced condensation and snow formation in a cloud chamber," Opt. Lett. 37, 1214-1216 (2012)