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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Editor: Zhizhan Xu
  • Vol. 1, Iss. 1 — Jan. 20, 2003
  • pp: 56–59

Competition between multiphoton/tunnel ionization and filamentation induced by powerful femtosecond laser pulses in air

W. Liu, Q. Luo, and S. L. Chin  »View Author Affiliations


Chinese Optics Letters, Vol. 1, Issue 1, pp. 56-59 (2003)


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Abstract

In this work we present experiments by focusing 42 femtosecond laser pulses in air using three different focal length lenses: f=100, 30 and 5 cm. For the longest focal length, only the filament, which is a weak plasma column, is observed. When the shorter focal length lens is used, a high density plasma is generated near the geometrical focus and coexists with a weak plasma channel of the filament. Under the tightest focusing condition, filamentation is prevented and only a strong plasma volume appears at the geometrical focus.

© 2005 Chinese Optics Letters

OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(300.2530) Spectroscopy : Fluorescence, laser-induced
(320.7120) Ultrafast optics : Ultrafast phenomena
(320.7150) Ultrafast optics : Ultrafast spectroscopy

Citation
W. Liu, Q. Luo, and S. L. Chin, "Competition between multiphoton/tunnel ionization and filamentation induced by powerful femtosecond laser pulses in air," Chin. Opt. Lett. 1, 56-59 (2003)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-1-1-56

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