We examine the nonlinear dynamics of femtosecond filaments in air at different pressures. Emphasis is placed on the changes in multiple filamentation patterns produced by terawatt laser pulses. Principal modifications induced by pressure variations apply to the onset distance, size, and number of the filaments inside the laser bundle.
© 2006 Optical Society of America
Original Manuscript: December 13, 2005
Revised Manuscript: January 16, 2006
Manuscript Accepted: January 31, 2006
Stéphanie Champeaux and Luc Bergé, "Long-range multifilamentation of femtosecond laser pulses versus air pressure," Opt. Lett. 31, 1301-1303 (2006)