Triggering and guiding HV discharge in air by filamentation of single and dual fs pulses
- 20 February 2009
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 17 (5), 3461-3468
- https://doi.org/10.1364/oe.17.003461
Abstract
The triggering and guiding of the stationary high voltage (HV) discharges at 5–40 kV are demonstrated by using plasma filaments generated by single and dual femtosecond(fs) laser pulses in air. A significant reduction of the breakdown voltage threshold due to the pre-ionization of the air gap by laser pulse filamentaion was observed. The amount of free electrons of filaments generated by different pulse configurations was compared by sonography method. The lifetime of filaments is measured by using time-resolved fluorescence spectrum, and the lifetime of filaments generated by dual fs laser pulses was doubled due to the re-ionization by the succeeding pulse. The triggering ability of dual fs laser pulses was demonstrated to be enhanced due to the longer lifetime of filaments.Keywords
This publication has 16 references indexed in Scilit:
- Electric events synchronized with laser filaments in thundercloudsOptics Express, 2008
- The comparison study of diagnostics of light filaments in airScience China Physics Mechanics and Astronomy, 2006
- Prolongation of the fluorescence lifetime of plasma channels in air induced by femtosecond laser pulsesApplied Physics B Laser and Optics, 2005
- Triggering and guiding of megavolt discharges by laser-induced filaments under rain conditionsApplied Physics Letters, 2004
- Teramobile: A mobile femtosecond-terawatt laser and detection systemThe European Physical Journal Applied Physics, 2002
- Characteristics of self-guided laser plasma channels generated by femtosecond laser pulses in airPhysical Review E, 2002
- Femtosecond laser-guided electric discharge in airPhysical Review E, 2001
- Re-focusing during the propagation of a focused femtosecond Ti:Sapphire laser pulse in airOptics Communications, 1999
- The influence of electron density on the formation of streamers in electrical discharges triggered with ultrashort laser pulsesIEEE Transactions on Plasma Science, 1999
- Femtosecond ultraviolet laser pulse induced lightning discharges in gasesIEEE Journal of Quantum Electronics, 1995