By studying the conical emission of a blue femtosecond laser filament in air, it is shown that self-improvement of the beams' spatial mode quality occurs for a self-guided laser pulse.
© 2006 Optical Society of America
Original Manuscript: April 12, 2006
Revised Manuscript: May 29, 2006
Manuscript Accepted: May 31, 2006
Published: August 9, 2006
B. Prade, M. Franco, A. Mysyrowicz, A. Couairon, H. Buersing, B. Eberle, M. Krenz, D. Seiffer, and O. Vasseur, "Spatial mode cleaning by femtosecond filamentation in air," Opt. Lett. 31, 2601-2603 (2006)