2013/10/22 by N. Jhajj, Y. -H. Cheng, Y.-H. Cheng +2 · 1 citation
Engineering · Physics and Astronomy · #Beam (structure) #Dynamics (music) #Excitation #Femtosecond #Filamentation #Laser #Laser Material Processing Techniques #Laser beam quality #Laser beams #Laser-Matter Interactions and Applications #Laser-Plasma Interactions and Diagnostics #physics.optics
paper · pdf · doi:10.1364/oe.21.028980
6 pages, 4 figures
arxiv created 2013/10/22 · openalex publication_date 2013/11/15 · openalex created_date 2016/06/24 · arxiv updated 2017/07/26 · openalex updated_date 2026/08/05
We investigate beam pointing dynamics in filamentation in gases driven by high repetition rate femtosecond laser pulses. Upon sudden exposure of a gas to a kilohertz train of filamenting pulses, successive filaments are steered from their original direction to a new stable direction whose equilibrium is determined by a balance among buoyant, viscous, and diffusive processes in the gas. The beam mode is preserved. Results are shown for Xe and air, but are broadly applicable to all configurations employing intense, high repetition rate femtosecond laser pulses in gases.