Multiple filamentation has been observed when focusing a femtosecond laser pulse into a methanol solution with an axicon. It is found that multiple long filaments are located on the central spot and ring structures of the quasi-Bessel beam created by the axicon. Since the quasi-Bessel profile is determined by the axicon properties, the axicon has been suggested as a simple optics to control multiple filaments.
© 2012 Optical Society of America
Original Manuscript: November 3, 2011
Revised Manuscript: December 18, 2011
Manuscript Accepted: January 18, 2012
Published: February 24, 2012
Xiaodong Sun, Hui Gao, Bin Zeng, Shengqi Xu, Weiwei Liu, Ya Cheng, Zhizhan Xu, and Guoguang Mu, "Multiple filamentation generated by focusing femtosecond laser with axicon," Opt. Lett. 37, 857-859 (2012)